CVE-2026-21256 HIGH

CVE-2026-21256: GitHub Copilot and Visual Studio Remote Code Execution Vulnerability

Vendor Microsoft
Product Microsoft Visual Studio 2022 version 17.14
Weakness CWE-77
Published February 10, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 10, 2026 CVE published
May 11, 2026 Record updated