Windows CVE-2026-20866
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Management Services on Windows 10 and Windows Server 2019 contains a race condition in shared resource synchronization that enables local privilege escalation for authenticated users. An attacker with local access can exploit improper locking mechanisms to gain elevated system privileges. …
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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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