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CVE-2021-41334

Status: ModifiedHigh (7.8)—

Windows Desktop Bridge Elevation of Privilege Vulnerability

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (4)

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-41334",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      },
      {
        "type": "Secondary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
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      "source": "secure@microsoft.com",
      "affectedData": [
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            "cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1288:*:*:*:*:*:x86:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows 10 Version 21H1",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.19043.1288",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM64-based Systems",
            "32-bit Systems"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2022:10.0.20348.288:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows Server 2022",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.20348.288",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
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        },
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          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1288:*:*:*:*:*:x64:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows 10 Version 2004",
          "versions": [
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              "version": "10.0.0",
              "lessThan": "10.0.19041.1288",
              "versionType": "custom"
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          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1288:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows Server version 2004",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.19041.1288",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1288:*:*:*:*:*:x86:*",
            "cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1288:*:*:*:*:*:arm64:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows 10 Version 20H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.19042.1288",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1288:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows Server version 20H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.19042.1288",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.258:*:*:*:*:*:x64:*",
            "cpe:2.3:o:microsoft:windows_11_21H2:10.0.22000.258:*:*:*:*:*:arm64:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows 11 version 21H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.0",
              "lessThan": "10.0.22000.258",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems",
            "ARM64-based Systems"
          ]
        }
      ]
    }
  ],
  "published": "2021-10-13T01:15:12.553",
  "references": [
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41334",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41334",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Windows Desktop Bridge Elevation of Privilege Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de Elevación de Privilegios en Windows Desktop Bridge"
    }
  ],
  "lastModified": "2026-06-17T04:08:21.653",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "9E2C378B-1507-4C81-82F6-9F599616845A"
            },
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              "matchCriteriaId": "FAE4278F-71A7-43E9-8F79-1CBFAE71D730"
            },
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              "matchCriteriaId": "AAE74AF3-C559-4645-A6C0-25C3D647AAC8"
            },
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              "matchCriteriaId": "B9F64296-66BF-4F1D-A11C-0C44C347E2AC"
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              "matchCriteriaId": "821614DD-37DD-44E2-A8A4-FE8D23A33C3C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}