CVE-2026-21256

Microsoft · Published February 11, 2026

8.8

CVSS v3.1

HIGH

Patch availableGet patch

Description

GitHub Copilot and Visual Studio Remote Code Execution Vulnerability. Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute code over a network.

Affected Products

Microsoft Visual Studio 2022 version 17.14
Microsoft Visual Studio 2026 version 18.3

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C