EUVD-2026-22551
GHSA-8h4w-q329-j73w
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
Acceptance of extraneous untrusted data with trusted data in Windows COM allows an unauthorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows COM across Windows 10 (1809, 21H2, 22H2), Windows 11 (22H3-26H1), and Windows Server (2019-2025) allows unauthenticated attackers with local access to achieve full system compromise (high confidentiality, integrity, and availability impact) by exploiting acceptance of untrusted data alongside trusted data. CVSS 8.4 reflects the severe impact of complete privilege escalation despite requiring local access. …
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RemediationAI
Within 24 hours: Identify all Windows 10 (versions 1809, 21H2, 22H2), Windows 11 (22H3-26H1), and Windows Server 2019-2025 systems in your estate and assess exposure to local users. Within 7 days: Apply vendor-released patch to all identified systems according to your change management process, prioritizing servers and workstations with high-privilege user access. …
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External POC / Exploit Code
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