Windows CVE-2026-20809
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Time-of-check time-of-use (toctou) race condition in Windows Kernel Memory allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Kernel Memory affects Windows 10 21h2 and Windows Server 2022 23h2, exploitable by local authenticated users through a race condition between permission checks and memory access. An attacker with local access can leverage this window to gain elevated system privileges. …
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RemediationAI
Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.
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