CVE-2026-21221 — HIGH (7.0)

Q: How severe is CVE-2026-21221?

CVE-2026-21221 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-21221?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 24H2, Microsoft Windows 11 25H2, Microsoft Windows Server 2025.

Vulnerability 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.

CVSS Score

7.0

HIGH

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

Affected Products

Vendor	Product	Versions
Microsoft	Windows 11 24H2	< 10.0.26100.7623
Microsoft	Windows 11 25H2	< 10.0.26200.7623
Microsoft	Windows Server 2025	< 10.0.26100.32230

Related Weaknesses (CWE)

CWE-362 CWE-416

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21221Vendor Advisory

FAQ

What is CVE-2026-21221?

CVE-2026-21221 is a vulnerability with a CVSS score of 7.0 (HIGH). Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc) allows an authorized attacker to elevate privileges locally...

How severe is CVE-2026-21221?

CVE-2026-21221 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-21221?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 24H2, Microsoft Windows 11 25H2, Microsoft Windows Server 2025.