Windows 11 24h2
CVE-2026-21221
HIGH
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows 11 and Windows Server 2025 Capability Access Management Service results from a race condition in resource synchronization, enabling authenticated local users to gain elevated system privileges. The vulnerability affects multiple recent Windows versions (24h2 and 25h2) and currently lacks a patch. No public exploit code has been disclosed, though the attack requires local access and moderate complexity to execute.
Technical ContextAI
Classified as CWE-362 (Race Condition). Affects the Capability Access Management component of Windows 11 24H2. Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) 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 Information Disclosure
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External POC / Exploit Code
Leaving vuln.today