CVE-2026-77491 Windows GDI Information Disclosure Vulnerability

{
  "id": "1343c9e56da8e5aa8f1db0cffd7efe314af05799439d249a00c6c90bab5bbf1a",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77491",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-77491 Windows GDI Information Disclosure Vulnerability",
    "summary": "An out-of-bounds read in Windows GDI may allow an unauthorized local attacker to disclose information.",
    "evidence": "Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information locally.",
    "products": [
      {
        "name": {
          "value": "Windows GDI",
          "evidence": "Out-of-bounds read in Windows GDI"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-77491",
        "evidence": "CVE-2026-77491 Windows GDI Information Disclosure Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26669,
  "published_at": "2026-09-08T14:00:00+00:00"
}