SB2026021055 - Security feature bypass vulnerability in Windows Shell
Published: February 10, 2026
Security Bulletin ID
SB2026021055
Severity
Critical
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Protection Mechanism Failure (CVE-ID: CVE-2026-21510)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures. An attacker can trick the victim into clicking on a specially crafted URL or shortcut file to bypass Windows SmartScreen and Windows Shell security prompts and execute arbitrary code on the system.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install update from vendor's website.