Command Injection in Visual Studio - CVE-2026-21256

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU122634

Command Injection in Visual Studio - CVE-2026-21256

Published: February 10, 2026


Vulnerability identifier: #VU122634
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-21256
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Visual Studio

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation in GitHub Copilot and Visual Studio. A remote attacker can pass specially crafted data to the application and execute arbitrary commands.


How to mitigate CVE-2026-21256

Install updates from vendor's website.

Sources