{
  "cveId": "CVE-2021-43239",
  "url": "https://patchblox.com/security/cve/CVE-2021-43239",
  "summary": "CVE-2021-43239 is fixed in 17 products on 1 platform, first by KB5008212, released December 14, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Windows Recovery Environment Agent Elevation of Privilege Vulnerability",
  "description": "",
  "published": "2021-12-14T14:00:00Z",
  "severity": "Important",
  "cvss": 7.1,
  "epss": 0.00557,
  "epssPercentile": 0.4668,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43239",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 2004 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "fixedVersion": "22000.376",
      "fix": "KB5008215",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008215",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "fixedVersion": "22000.376",
      "fix": "KB5008215",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008215",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.405",
      "fix": "KB5008223",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008223",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.405",
      "fix": "KB5008223",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008223",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 2004 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5008212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5008212",
      "released": "2021-12-14T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}