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FKIE_CVE-2026-21256

Vulnerability from fkie_nvd - Published: 2026-02-10 18:16 - Updated: 2026-06-17 10:18
Severity
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute code over a network.
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21256Vendor Advisory
Impacted products
Vendor Product Version
microsoft visual_studio_2022 *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Microsoft Visual Studio 2022 version 17.14",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "17.14.26",
              "status": "affected",
              "version": "17.14.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "Microsoft Visual Studio 2026 version 18.3",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "18.3.0",
              "status": "affected",
              "version": "18.3.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:-:*:*",
              "matchCriteriaId": "D5D30CC7-E672-4D7F-B1BA-2D56DC36109C",
              "versionEndExcluding": "17.14.26",
              "versionStartIncluding": "17.14.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper neutralization of special elements used in a command (\u0027command injection\u0027) in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute code over a network."
    },
    {
      "lang": "es",
      "value": "Neutralizaci\u00f3n incorrecta de elementos especiales utilizados en un comando (\u0027inyecci\u00f3n de comandos\u0027) en GitHub Copilot y Visual Studio permite a un atacante no autorizado ejecutar c\u00f3digo a trav\u00e9s de una red."
    }
  ],
  "id": "CVE-2026-21256",
  "lastModified": "2026-06-17T10:18:22.543",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21256",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-11T04:56:10.469863Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-10T18:16:27.330",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21256"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        },
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.