CVE-2026-78446 Windows Distributed File System (DFS) Denial of Service Vulnerability

{
  "id": "74ff2f6191c237609ee547e3e31f3b6d6ef59c13f6e98cd0e937280fc0a67465",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78446",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-78446 Windows Distributed File System (DFS) Denial of Service Vulnerability",
    "summary": "An authorized attacker can cause a denial of service over a network through a use-after-free in Windows Distributed File System (DFS).",
    "evidence": "Use after free in Windows Distributed File System (DFS) allows an authorized attacker to deny service over a network.",
    "products": [
      {
        "name": {
          "value": "Windows Distributed File System (DFS)",
          "evidence": "Use after free in Windows Distributed File System (DFS) allows an authorized attacker to deny service over a network."
        },
        "prerequisites": [
          {
            "value": "authorized attacker",
            "evidence": "allows an authorized attacker to deny service over a network"
          }
        ],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-78446",
        "evidence": "CVE-2026-78446 Windows Distributed File System (DFS) Denial of Service Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 27122,
  "published_at": "2026-09-08T14:00:00+00:00"
}