Windows CVE-2026-20869
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Local Session Manager (LSM) across Windows 11 23h2, Windows Server 2012, and 2019 stems from improper synchronization in shared resource handling, enabling authenticated attackers to elevate privileges on affected systems. The vulnerability requires local access and specific timing conditions to exploit, with no patch currently available. …
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RemediationAI
Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.
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