SB2026011403 - Privilege escalation in Microsoft DWM Core Library
Published: January 14, 2026
Security Bulletin ID
SB2026011403
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 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-20842)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Microsoft DWM Core Library. A local user can gain elevated privileges on the target system.
Remediation
Install update from vendor's website.