Home/CVE/Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Managem
CVE

CVE-2026-21221

Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Managem

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

HIGH · CVSS 7 EPSS 0.00075
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416Use After Free
▤

Affected Products & Versions

3
microsoft windows 11 24h2< 10.0.26100.7623
microsoft windows 11 25h2< 10.0.26200.7623
microsoft windows server 2025< 10.0.26100.32230
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jan 2026 · 06:16 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2026-21221Elevation of Privilege
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