CVE-2026-21256

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Microsoft Visual Studio

PublishedFeb 10, 2026

First seenFeb 10, 2026

Weakness typeCWE-77Command injection CWE-94Code injection

How to fix

Update

microsoft visual_studio_202217.14.26 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21256

Affected products

Product	Affected versions	Fixed in
microsoft visual_studio_2022	17.14.0 ≤ v < 17.14.26	17.14.26

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