CVE-2026-21256

GitHub Copilot and Visual Studio Remote Code Execution Vulnerability

Published Feb 10, 2026 CVSS 3.1 · 8.8 High EPSS 1.2% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Microsoft visual Studio 2026
CPEs cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft visual Studio 2026
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:-:*:*
Type Values Removed Values Added
Description 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.
Title GitHub Copilot and Visual Studio Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft visual Studio 2022
Weaknesses CWE-77
CWE-94
CPEs cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft visual Studio 2022
References
Metrics cvssV3_1

{'score': 8.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Aug 19, 2026, 4:26 PM
Reserved
Dec 11, 2025, 9:02 PM
Status
Analyzed
Published
Feb 10, 2026, 6:16 PM
Modified
Jun 17, 2026, 10:18 AM