Windows Server 2019
CVE-2026-20867
HIGH
Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Management Services affects Windows Server 2019, Windows 11 24h2, and Windows Server 2025 through improper synchronization of shared resources, enabling authenticated users to gain elevated system privileges. The vulnerability exploits a race condition that an attacker can trigger without user interaction, though no patch is currently available.
Technical ContextAI
Classified as CWE-362 (Race Condition). Affects the Windows Management component of Windows 10 1809. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
View allShare
External POC / Exploit Code
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