Search criteria

4833 vulnerabilities found for Windows Server 2012 by Microsoft

CVE-2026-21265 (GCVE-0-2026-21265)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Secure Boot Certificate Expiration Security Feature Bypass Vulnerability
Summary
Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality and avoid compromising security by losing security fixes related to Windows boot manager or Secure Boot. The operating system’s certificate update protection mechanism relies on firmware components that might contain defects, which can cause certificate trust updates to fail or behave unpredictably. This leads to potential disruption of the Secure Boot trust chain and requires careful validation and deployment to restore intended security guarantees. Certificate Authority (CA) Location Purpose Expiration Date Microsoft Corporation KEK CA 2011 KEK Signs updates to the DB and DBX 06/24/2026 Microsoft Corporation UEFI CA 2011 DB Signs 3rd party boot loaders, Option ROMs, etc. 06/27/2026 Microsoft Windows Production PCA 2011 DB Signs the Windows Boot Manager 10/19/2026 For more information see this CVE and Windows Secure Boot certificate expiration and CA updates.
CWE
  • CWE-1329 - - Reliance on Component That is Not Updateable
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21265",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:57:08.255762Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:28:58.114Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality and avoid compromising security by losing security fixes related to Windows boot manager or Secure Boot.\nThe operating system\u2019s certificate update protection mechanism relies on firmware components that might contain defects, which can cause certificate trust updates to fail or behave unpredictably. This leads to potential disruption of the Secure Boot trust chain and requires careful validation and deployment to restore intended security guarantees.\n\n\n\nCertificate Authority (CA)\nLocation\nPurpose\nExpiration Date\n\n\n\n\nMicrosoft Corporation KEK CA 2011\nKEK\nSigns updates to the DB and DBX\n06/24/2026\n\n\nMicrosoft Corporation UEFI CA 2011\nDB\nSigns 3rd party boot loaders, Option ROMs, etc.\n06/27/2026\n\n\nMicrosoft Windows Production PCA 2011\nDB\nSigns the Windows Boot Manager\n10/19/2026\n\n\n\nFor more information see this CVE and Windows Secure Boot certificate expiration and CA updates."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1329",
              "description": "CWE-1329 - Reliance on Component That is Not Updateable",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:03.686Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Secure Boot Certificate Expiration Security Feature Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21265"
        }
      ],
      "title": "Secure Boot Certificate Expiration Security Feature Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-21265",
    "datePublished": "2026-01-13T17:56:04.224Z",
    "dateReserved": "2025-12-11T21:02:05.738Z",
    "dateUpdated": "2026-01-27T19:14:03.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20940 (GCVE-0-2026-20940)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Summary
Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
CWE
  • CWE-822 - Untrusted Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20940",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:51.242064Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:22:43.539Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-822",
              "description": "CWE-822: Untrusted Pointer Dereference",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:43.428Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20940"
        }
      ],
      "title": "Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20940",
    "datePublished": "2026-01-13T17:56:44.942Z",
    "dateReserved": "2025-12-04T20:04:16.338Z",
    "dateUpdated": "2026-01-27T19:14:43.428Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20934 (GCVE-0-2026-20934)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20934",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:04.255676Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:22:54.002Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:42.220Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20934"
        }
      ],
      "title": "Windows SMB Server Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20934",
    "datePublished": "2026-01-13T17:56:43.877Z",
    "dateReserved": "2025-12-04T20:04:16.337Z",
    "dateUpdated": "2026-01-27T19:14:42.220Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20931 (GCVE-0-2026-20931)

Vulnerability from nvd – Published: 2026-01-13 17:57 – Updated: 2026-01-27 19:15
VLAI?
Title
Windows Telephony Service Elevation of Privilege Vulnerability
Summary
External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20931",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:55:54.728Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-73",
              "description": "CWE-73: External Control of File Name or Path",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:15:04.184Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Telephony Service Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20931"
        }
      ],
      "title": "Windows Telephony Service Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20931",
    "datePublished": "2026-01-13T17:57:03.440Z",
    "dateReserved": "2025-12-04T20:04:16.336Z",
    "dateUpdated": "2026-01-27T19:15:04.184Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20936 (GCVE-0-2026-20936)

Vulnerability from nvd – Published: 2026-01-13 17:57 – Updated: 2026-01-27 19:15
VLAI?
Title
Windows NDIS Information Disclosure Vulnerability
Summary
Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack.
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20936",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T18:53:29.524553Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-13T18:54:38.830Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Out-of-bounds read in Windows NDIS allows an authorized attacker to disclose information with a physical attack."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:15:05.464Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows NDIS Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20936"
        }
      ],
      "title": "Windows NDIS Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20936",
    "datePublished": "2026-01-13T17:57:04.676Z",
    "dateReserved": "2025-12-04T20:04:16.337Z",
    "dateUpdated": "2026-01-27T19:15:05.464Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20925 (GCVE-0-2026-20925)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
NTLM Hash Disclosure Spoofing Vulnerability
Summary
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20925",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:33:36.484066Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:17.902Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-73",
              "description": "CWE-73: External Control of File Name or Path",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:39.619Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "NTLM Hash Disclosure Spoofing Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20925"
        }
      ],
      "title": "NTLM Hash Disclosure Spoofing Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20925",
    "datePublished": "2026-01-13T17:56:41.739Z",
    "dateReserved": "2025-12-04T20:04:16.335Z",
    "dateUpdated": "2026-01-27T19:14:39.619Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20929 (GCVE-0-2026-20929)

Vulnerability from nvd – Published: 2026-01-13 17:57 – Updated: 2026-01-27 19:15
VLAI?
Title
Windows HTTP.sys Elevation of Privilege Vulnerability
Summary
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20929",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-09T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:57:00.946Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284: Improper Access Control",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:15:03.454Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows HTTP.sys Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20929"
        }
      ],
      "title": "Windows HTTP.sys Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20929",
    "datePublished": "2026-01-13T17:57:02.860Z",
    "dateReserved": "2025-12-04T20:04:16.336Z",
    "dateUpdated": "2026-01-27T19:15:03.454Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20926 (GCVE-0-2026-20926)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20926",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:55:58.479252Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:11.937Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:40.473Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20926"
        }
      ],
      "title": "Windows SMB Server Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20926",
    "datePublished": "2026-01-13T17:56:42.320Z",
    "dateReserved": "2025-12-04T20:04:16.336Z",
    "dateUpdated": "2026-01-27T19:14:40.473Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20927 (GCVE-0-2026-20927)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Denial of Service Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to deny service over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20927",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:33:23.299425Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:06.639Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to deny service over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:41.054Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20927"
        }
      ],
      "title": "Windows SMB Server Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20927",
    "datePublished": "2026-01-13T17:56:42.801Z",
    "dateReserved": "2025-12-04T20:04:16.336Z",
    "dateUpdated": "2026-01-27T19:14:41.054Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20921 (GCVE-0-2026-20921)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20921",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:01.953205Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:39.829Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:37.471Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20921"
        }
      ],
      "title": "Windows SMB Server Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20921",
    "datePublished": "2026-01-13T17:56:39.351Z",
    "dateReserved": "2025-12-04T20:04:16.335Z",
    "dateUpdated": "2026-01-27T19:14:37.471Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20922 (GCVE-0-2026-20922)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows NTFS Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20922",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:16.298262Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:34.171Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems",
            "ARM64-based Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:38.033Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows NTFS Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20922"
        }
      ],
      "title": "Windows NTFS Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20922",
    "datePublished": "2026-01-13T17:56:40.106Z",
    "dateReserved": "2025-12-04T20:04:16.335Z",
    "dateUpdated": "2026-01-27T19:14:38.033Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20919 (GCVE-0-2026-20919)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20919",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:03.156012Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:23:45.134Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:36.318Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20919"
        }
      ],
      "title": "Windows SMB Server Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20919",
    "datePublished": "2026-01-13T17:56:38.196Z",
    "dateReserved": "2025-12-04T20:04:16.335Z",
    "dateUpdated": "2026-01-27T19:14:36.318Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20875 (GCVE-0-2026-20875)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Summary
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20875",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:34:41.346351Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:24:09.098Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:34.026Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20875"
        }
      ],
      "title": "Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20875",
    "datePublished": "2026-01-13T17:56:35.731Z",
    "dateReserved": "2025-12-03T05:54:20.387Z",
    "dateUpdated": "2026-01-27T19:14:34.026Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20872 (GCVE-0-2026-20872)

Vulnerability from nvd – Published: 2026-01-13 17:57 – Updated: 2026-01-27 19:15
VLAI?
Title
NTLM Hash Disclosure Spoofing Vulnerability
Summary
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20872",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T20:07:20.075074Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-13T20:07:30.680Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-73",
              "description": "CWE-73: External Control of File Name or Path",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:15:00.336Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "NTLM Hash Disclosure Spoofing Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20872"
        }
      ],
      "title": "NTLM Hash Disclosure Spoofing Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20872",
    "datePublished": "2026-01-13T17:57:00.955Z",
    "dateReserved": "2025-12-03T05:54:20.382Z",
    "dateUpdated": "2026-01-27T19:15:00.336Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20869 (GCVE-0-2026-20869)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20869",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:57:00.709292Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:24:14.797Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:33.383Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20869"
        }
      ],
      "title": "Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20869",
    "datePublished": "2026-01-13T17:56:35.066Z",
    "dateReserved": "2025-12-03T05:54:20.381Z",
    "dateUpdated": "2026-01-27T19:14:33.383Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20868 (GCVE-0-2026-20868)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20868",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:56:10.479Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:58.420Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20868"
        }
      ],
      "title": "Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20868",
    "datePublished": "2026-01-13T17:56:58.903Z",
    "dateReserved": "2025-12-03T05:54:20.381Z",
    "dateUpdated": "2026-01-27T19:14:58.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20856 (GCVE-0-2026-20856)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
Summary
Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20856",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:08.248762Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:24:53.664Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:29.682Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Server Update Service (WSUS) Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20856"
        }
      ],
      "title": "Windows Server Update Service (WSUS) Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20856",
    "datePublished": "2026-01-13T17:56:30.668Z",
    "dateReserved": "2025-12-03T05:54:20.380Z",
    "dateUpdated": "2026-01-27T19:14:29.682Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20860 (GCVE-0-2026-20860)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Summary
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20860",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:56.752586Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:24:31.148Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Access of resource using incompatible type (\u0027type confusion\u0027) in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:31.896Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20860"
        }
      ],
      "title": "Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20860",
    "datePublished": "2026-01-13T17:56:33.121Z",
    "dateReserved": "2025-12-03T05:54:20.380Z",
    "dateUpdated": "2026-01-27T19:14:31.896Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20847 (GCVE-0-2026-20847)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Microsoft Windows File Explorer Spoofing Vulnerability
Summary
Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network.
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20847",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:35:57.911888Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:25:12.210Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform spoofing over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:27.895Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Microsoft Windows File Explorer Spoofing Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20847"
        }
      ],
      "title": "Microsoft Windows File Explorer Spoofing Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20847",
    "datePublished": "2026-01-13T17:56:28.912Z",
    "dateReserved": "2025-12-03T05:54:20.377Z",
    "dateUpdated": "2026-01-27T19:14:27.895Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20848 (GCVE-0-2026-20848)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows SMB Server Elevation of Privilege Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20848",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:55:58.772Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in Windows SMB Server allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:53.135Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows SMB Server Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20848"
        }
      ],
      "title": "Windows SMB Server Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20848",
    "datePublished": "2026-01-13T17:56:53.183Z",
    "dateReserved": "2025-12-03T05:54:20.377Z",
    "dateUpdated": "2026-01-27T19:14:53.135Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20849 (GCVE-0-2026-20849)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Kerberos Elevation of Privilege Vulnerability
Summary
Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.
CWE
  • CWE-807 - Reliance on Untrusted Inputs in a Security Decision
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20849",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:56:38.815Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-807",
              "description": "CWE-807: Reliance on Untrusted Inputs in a Security Decision",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:53.677Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Kerberos Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20849"
        }
      ],
      "title": "Windows Kerberos Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20849",
    "datePublished": "2026-01-13T17:56:53.833Z",
    "dateReserved": "2025-12-03T05:54:20.377Z",
    "dateUpdated": "2026-01-27T19:14:53.677Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20840 (GCVE-0-2026-20840)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows NTFS Remote Code Execution Vulnerability
Summary
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20840",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:17.262285Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:25:29.250Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:26.159Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows NTFS Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20840"
        }
      ],
      "title": "Windows NTFS Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20840",
    "datePublished": "2026-01-13T17:56:27.184Z",
    "dateReserved": "2025-12-03T05:54:20.376Z",
    "dateUpdated": "2026-01-27T19:14:26.159Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20839 (GCVE-0-2026-20839)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Client-Side Caching (CSC) Service Information Disclosure Vulnerability
Summary
Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally.
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20839",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:36:28.719151Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:25:34.273Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose information locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284: Improper Access Control",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:25.531Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Client-Side Caching (CSC) Service Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20839"
        }
      ],
      "title": "Windows Client-Side Caching (CSC) Service Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20839",
    "datePublished": "2026-01-13T17:56:26.609Z",
    "dateReserved": "2025-12-03T05:54:20.376Z",
    "dateUpdated": "2026-01-27T19:14:25.531Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20843 (GCVE-0-2026-20843)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability
Summary
Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20843",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T04:56:11.481Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284: Improper Access Control",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:52.497Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20843"
        }
      ],
      "title": "Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20843",
    "datePublished": "2026-01-13T17:56:52.600Z",
    "dateReserved": "2025-12-03T05:54:20.376Z",
    "dateUpdated": "2026-01-27T19:14:52.497Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20833 (GCVE-0-2026-20833)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Kerberos Information Disclosure Vulnerability
Summary
Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.
CWE
  • CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20833",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:37:13.975379Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:26:09.682Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-327",
              "description": "CWE-327: Use of a Broken or Risky Cryptographic Algorithm",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:22.202Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Kerberos Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20833"
        }
      ],
      "title": "Windows Kerberos Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20833",
    "datePublished": "2026-01-13T17:56:23.072Z",
    "dateReserved": "2025-12-03T05:54:20.375Z",
    "dateUpdated": "2026-01-27T19:14:22.202Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20834 (GCVE-0-2026-20834)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Spoofing Vulnerability
Summary
Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.
CWE
  • CWE-36 - Absolute Path Traversal
  • CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20834",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:37:06.978682Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:26:04.639Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-36",
              "description": "CWE-36: Absolute Path Traversal",
              "lang": "en-US",
              "type": "CWE"
            },
            {
              "cweId": "CWE-359",
              "description": "CWE-359: Exposure of Private Personal Information to an Unauthorized Actor",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:22.724Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Spoofing Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20834"
        }
      ],
      "title": "Windows Spoofing Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20834",
    "datePublished": "2026-01-13T17:56:23.700Z",
    "dateReserved": "2025-12-03T05:54:20.375Z",
    "dateUpdated": "2026-01-27T19:14:22.724Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20831 (GCVE-0-2026-20831)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Summary
Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20831",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T04:56:57.697851Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:26:21.278Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:21.171Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20831"
        }
      ],
      "title": "Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20831",
    "datePublished": "2026-01-13T17:56:21.945Z",
    "dateReserved": "2025-12-03T05:54:20.375Z",
    "dateUpdated": "2026-01-27T19:14:21.171Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20828 (GCVE-0-2026-20828)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows rndismp6.sys Information Disclosure Vulnerability
Summary
Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack.
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20828",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:37:41.694421Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:26:31.327Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:19.945Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows rndismp6.sys Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20828"
        }
      ],
      "title": "Windows rndismp6.sys Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20828",
    "datePublished": "2026-01-13T17:56:20.817Z",
    "dateReserved": "2025-12-03T05:54:20.374Z",
    "dateUpdated": "2026-01-27T19:14:19.945Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20824 (GCVE-0-2026-20824)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Windows Remote Assistance Security Feature Bypass Vulnerability
Summary
Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature locally.
CWE
  • CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20824",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:38:13.196418Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:26:53.470Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-693",
              "description": "CWE-693: Protection Mechanism Failure",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:17.409Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Remote Assistance Security Feature Bypass Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20824"
        }
      ],
      "title": "Windows Remote Assistance Security Feature Bypass Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20824",
    "datePublished": "2026-01-13T17:56:18.315Z",
    "dateReserved": "2025-12-03T05:54:20.374Z",
    "dateUpdated": "2026-01-27T19:14:17.409Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-20821 (GCVE-0-2026-20821)

Vulnerability from nvd – Published: 2026-01-13 17:56 – Updated: 2026-01-27 19:14
VLAI?
Title
Remote Procedure Call Information Disclosure Vulnerability
Summary
Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized attacker to disclose information locally.
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8276 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4648 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.6809 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.6809 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.7623 (custom)
Create a notification for this product.
    Microsoft Windows 11 version 22H3 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.6491 (custom)
Create a notification for this product.
    Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.2092 (custom)
Create a notification for this product.
    Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.7623 (custom)
Create a notification for this product.
    Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32230 (custom)
Create a notification for this product.
    Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8783 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.6003.0 , < 6.0.6003.23717 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.1.7601.0 , < 6.1.7601.28117 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25868 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
    Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22968 (custom)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20821",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T19:38:39.423410Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:27:11.382Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8276",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.4648",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.6809",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems",
            "32-bit Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.6809",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.7623",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 22H3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.6491",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.25398.2092",
              "status": "affected",
              "version": "10.0.25398.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.7623",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32230",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.8783",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 Service Pack 2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.0.6003.23717",
              "status": "affected",
              "version": "6.0.6003.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2008 R2 Service Pack 1 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.1.7601.28117",
              "status": "affected",
              "version": "6.1.7601.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.2.9200.25868",
              "status": "affected",
              "version": "6.2.9200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2012 R2 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "6.3.9600.22968",
              "status": "affected",
              "version": "6.3.9600.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8276",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.4648",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.6809",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.6809",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.7623",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.6491",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_23h2:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.25398.2092",
                  "versionStartIncluding": "10.0.25398.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.7623",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32230",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.8783",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_sp2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.0.6003.23717",
                  "versionStartIncluding": "6.0.6003.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2008_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.1.7601.28117",
                  "versionStartIncluding": "6.1.7601.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.2.9200.25868",
                  "versionStartIncluding": "6.2.9200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "6.3.9600.22968",
                  "versionStartIncluding": "6.3.9600.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized attacker to disclose information locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-27T19:14:15.415Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Remote Procedure Call Information Disclosure Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20821"
        }
      ],
      "title": "Remote Procedure Call Information Disclosure Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-20821",
    "datePublished": "2026-01-13T17:56:16.538Z",
    "dateReserved": "2025-12-03T05:54:20.374Z",
    "dateUpdated": "2026-01-27T19:14:15.415Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}