CVE-2026-87709 Windows Host Guardian Service Tampering Vulnerability

{
  "id": "d6b5e5313439d7d179a7f84a0fa9f2362ef7beb8facce60049b6ff529b315a77",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87709",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-87709 Windows Host Guardian Service Tampering Vulnerability",
    "summary": "Improper access control in Windows Host Guardian Service could allow an authorized attacker to perform tampering locally.",
    "evidence": "Improper access control in Windows Host Guardian Service allows an authorized attacker to perform tampering locally.",
    "products": [
      {
        "name": {
          "value": "Windows Host Guardian Service",
          "evidence": "CVE-2026-87709 Windows Host Guardian Service Tampering Vulnerability"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-87709",
        "evidence": "CVE-2026-87709 Windows Host Guardian Service Tampering Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 25628,
  "published_at": "2026-10-13T14:00:00+00:00"
}