{
  "cveId": "CVE-2025-21391",
  "url": "https://patchblox.com/security/cve/CVE-2025-21391",
  "summary": "CVE-2025-21391 is fixed in 27 products on 1 platform, first by KB5052006, released February 11, 2025. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 11, 2025. Patch Radar priority: Patch now.",
  "title": "Windows Storage Elevation of Privilege Vulnerability",
  "description": "",
  "published": "2025-02-11T14:00:00Z",
  "severity": "Important",
  "cvss": 7.1,
  "cwe": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
  "epss": 0.02284,
  "epssPercentile": 0.83264,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": true,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Detected",
  "kev": {
    "added": "2025-02-11T00:00:00Z",
    "due": "2025-03-04T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable."
  },
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.7785",
      "fix": "KB5052006",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052006",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.7785",
      "fix": "KB5052006",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052006",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.6893",
      "fix": "KB5052000",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052000",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.6893",
      "fix": "KB5052000",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052000",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051974",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051974",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.20915",
      "fix": "KB5052040",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052040",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.20915",
      "fix": "KB5052040",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052040",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 22H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051989",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051989",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 22H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051989",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051989",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051989",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051989",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5051989",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051989",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for ARM64-based Systems",
      "fixedVersion": "26100.3194",
      "fix": "KB5051987",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051987",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for ARM64-based Systems",
      "fixedVersion": "26100.3107",
      "fix": "KB5052105",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052105",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for x64-based Systems",
      "fixedVersion": "26100.3194",
      "fix": "KB5051987",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051987",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for x64-based Systems",
      "fixedVersion": "26100.3107",
      "fix": "KB5052105",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052105",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.7785",
      "fix": "KB5052006",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052006",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.7785",
      "fix": "KB5052006",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052006",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.6893",
      "fix": "KB5052000",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052000",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.6893",
      "fix": "KB5052000",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052000",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.3207",
      "fix": "KB5051979",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051979",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.3148",
      "fix": "KB5052106",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052106",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.3207",
      "fix": "KB5051979",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051979",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.3148",
      "fix": "KB5052106",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052106",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
      "fixedVersion": "25398.1425",
      "fix": "KB5051980",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051980",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.3194",
      "fix": "KB5051987",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051987",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.3107",
      "fix": "KB5052105",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052105",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.3194",
      "fix": "KB5051987",
      "url": "https://patchblox.com/security/fix/microsoft/kb5051987",
      "released": "2025-02-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.3107",
      "fix": "KB5052105",
      "url": "https://patchblox.com/security/fix/microsoft/kb5052105",
      "released": "2025-02-11T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}