CVE-2026-83865 Windows Internet (wininet.dll) Tampering Vulnerability

{
  "id": "0b01c9da8be3b24377eae94aa96344a3fd786e328325371d6883c473b67f7d08",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83865",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-83865 Windows Internet (wininet.dll) Tampering Vulnerability",
    "summary": "Relative path traversal in Windows Internet (wininet.dll) allows an authorized attacker to perform tampering locally.",
    "evidence": "Relative path traversal in Windows Internet (wininet.dll) allows an authorized attacker to perform tampering locally.",
    "products": [
      {
        "name": {
          "value": "Windows Internet (wininet.dll)",
          "evidence": "CVE-2026-83865 Windows Internet (wininet.dll) Tampering Vulnerability"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-83865",
        "evidence": "CVE-2026-83865 Windows Internet (wininet.dll) Tampering Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 25015,
  "published_at": "2026-10-13T14:00:00+00:00"
}