CVE-2026-85840 Windows Event Viewer Information Disclosure Vulnerability

{
  "id": "13a8f8af843208763de1c4433c29d6cd5bb2d4fe0afe0e16b7469181efeb7316",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85840",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-85840 Windows Event Viewer Information Disclosure Vulnerability",
    "summary": "Windows Event Viewer may allow an authorized attacker to disclose information over a network.",
    "evidence": "Files or directories accessible to external parties in Windows Event Viewer allows an authorized attacker to disclose information over a network.",
    "products": [
      {
        "name": {
          "value": "Windows Event Viewer",
          "evidence": "Windows Event Viewer"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-85840",
        "evidence": "CVE-2026-85840 Windows Event Viewer Information Disclosure Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 25164,
  "published_at": "2026-10-13T14:00:00+00:00"
}