Windows CVE-2026-20934
HIGHCVSS VectorNVD
CVSS:3.1/AV:N/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 SMB Server allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in Windows SMB Server (Server 2025, Windows 11 24H2, Windows 10 22H2) stems from improper synchronization of shared resources during concurrent execution, enabling authenticated network attackers to gain elevated privileges. The vulnerability requires high complexity exploitation but carries high impact across confidentiality, integrity, and availability. …
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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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