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FKIE_CVE-2021-38655

Vulnerability from fkie_nvd - Published: 2021-09-15 12:15 - Updated: 2026-08-10 16:18
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
Microsoft Excel Remote Code Execution Vulnerability
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38655
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38655Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-1080/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
microsoft 365_apps -
microsoft excel 2013
microsoft excel 2013
microsoft excel 2016
microsoft office 2019
microsoft office 2019
microsoft office_online_server -
microsoft office_web_apps 2013
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft 365 Apps for Enterprise",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "status": "affected",
              "version": "16.0.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft Excel 2013 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "5381.1000",
              "status": "affected",
              "version": "15.0.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft Excel 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "5215.1000",
              "status": "affected",
              "version": "16.0.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Microsoft Office 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "status": "affected",
              "version": "19.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Office 2019 for Mac",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.53.21091200",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Office Online Server",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10378.20000",
              "status": "affected",
              "version": "16.0.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Office Web Apps Server 2013 Service Pack 1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "5381.1000",
              "status": "affected",
              "version": "15.0.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*",
              "matchCriteriaId": "40C15EDD-98D4-4D06-BA06-21AE0F33C72D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:excel:2013:*:*:*:*:*:*:*",
              "matchCriteriaId": "0390EFCA-87B4-42D6-817A-603765F49816",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*",
              "matchCriteriaId": "F564117D-450D-45C4-9688-AF35F630A8A7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*",
              "matchCriteriaId": "09BF0981-749E-470B-A7AC-95AD087797EF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*",
              "matchCriteriaId": "FF177984-A906-43FA-BF60-298133FBBD6B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*",
              "matchCriteriaId": "40961B9E-80B6-42E0-A876-58B3CE056E4E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E98AE986-FA31-4301-8025-E8915BA4AC5E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:*",
              "matchCriteriaId": "B3C3FC9A-D8E5-493A-A575-C831A9A28815",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Excel Remote Code Execution Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota  en Microsoft Excel"
    }
  ],
  "id": "CVE-2021-38655",
  "lastModified": "2026-08-10T16:18:11.337",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Secondary"
      }
    ]
  },
  "published": "2021-09-15T12:15:15.537",
  "references": [
    {
      "source": "secure@microsoft.com",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38655"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38655"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1080/"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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