« Back to list

CVE-2021-41336

Status: ModifiedMedium (5.5)—

Windows Kernel Information Disclosure 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 (2)

Microsoft — Windows 11Microsoft — Windows Server 2022

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-41336",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "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": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "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"
          ]
        },
        {
          "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": "2021-10-13T01:15:12.737",
  "references": [
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41336",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41336",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Windows Kernel Information Disclosure Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de Divulgación de Información en Windows Kernel"
    }
  ],
  "lastModified": "2026-06-17T04:08:21.933",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:*",
              "vulnerable": true,
              "matchCriteriaId": "B9F64296-66BF-4F1D-A11C-0C44C347E2AC"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:*",
              "vulnerable": true,
              "matchCriteriaId": "5D7F7DDB-440E-42CD-82F4-B2C13F3CC462"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "821614DD-37DD-44E2-A8A4-FE8D23A33C3C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}