CVE-2026-69841 Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability

{
  "id": "788002ad84f9f38a24b639047850f3f4b4ec1ac3acb3dc58b19cace2b48aaf6d",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69841",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-69841 Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability",
    "summary": "A heap-based buffer overflow in Windows EFS could allow an authorized attacker to elevate privileges locally.",
    "evidence": "Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges locally.",
    "products": [
      {
        "name": {
          "value": "Windows Encrypting File System (EFS)",
          "evidence": "Windows Encrypting File System (EFS)"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-69841",
        "evidence": "CVE-2026-69841 Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26942,
  "published_at": "2026-09-08T14:00:00+00:00"
}