CVE-2026-21221

HIGH
2026-01-13 [email protected]
7.0
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 7.0

Tags

Race Condition Windows 11 24h2 Windows 11 25h2 Windows Server 2025 Microsoft

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally.

Analysis

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. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

35
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +35
POC: 0

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CVE-2026-21221 vulnerability details – vuln.today
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