{
  "cveId": "CVE-2026-20876",
  "url": "https://patchblox.com/security/cve/CVE-2026-20876",
  "summary": "CVE-2026-20876 is fixed in 9 products on 1 platform, first by KB5073455, released January 13, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability",
  "description": "\u003Cp\u003EHeap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.\u003C/p\u003E",
  "published": "2026-01-13T08:00:00Z",
  "severity": "Critical",
  "cvss": 6.7,
  "cwe": "Heap-based Buffer Overflow",
  "epss": 0.00508,
  "epssPercentile": 0.43644,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20876",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for ARM64-based Systems",
      "fixedVersion": "22631.6491",
      "fix": "KB5073455",
      "url": "https://patchblox.com/security/fix/microsoft/kb5073455",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for x64-based Systems",
      "fixedVersion": "22631.6491",
      "fix": "KB5073455",
      "url": "https://patchblox.com/security/fix/microsoft/kb5073455",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5074109",
      "url": "https://patchblox.com/security/fix/microsoft/kb5074109",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5074109",
      "url": "https://patchblox.com/security/fix/microsoft/kb5074109",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5074109",
      "url": "https://patchblox.com/security/fix/microsoft/kb5074109",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5074109",
      "url": "https://patchblox.com/security/fix/microsoft/kb5074109",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
      "fixedVersion": "25398.2092",
      "fix": "KB5073450",
      "url": "https://patchblox.com/security/fix/microsoft/kb5073450",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.32230",
      "fix": "KB5073379",
      "url": "https://patchblox.com/security/fix/microsoft/kb5073379",
      "released": "2026-01-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.32230",
      "fix": "KB5073379",
      "url": "https://patchblox.com/security/fix/microsoft/kb5073379",
      "released": "2026-01-13T00:00:00Z"
    }
  ],
  "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"
  }
}