SB20260113134 - Privilege escalation in Microsoft Windows Admin Center
Published: January 13, 2026 Updated: May 21, 2026
Security Bulletin ID
SB20260113134
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2026-20965)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to the lack of proper verification of a cryptographic signature in Windows Admin Center. A local administrator can gain elevated privileges on the system.
Remediation
Install update from vendor's website.