SB20260113131 - Protection Mechanism Failure in Microsoft Windows Remote Assistance
Published: January 13, 2026
Security Bulletin ID
SB20260113131
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Protection Mechanism Failure (CVE-ID: CVE-2026-20824)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures in Windows Remote Assistance. A remote attacker can trick a victim to open a specially crafted file and evade Mark of the Web (MOTW) defenses.
Remediation
Install update from vendor's website.