CVE-2026-21256

GitHub Copilot and Visual Studio Remote Code Execution Vulnerability

CVSS 8.8 HIGHEPSS 1.1%CWE-77 CWE-94

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.8EPSS 1.1%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

10 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

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

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References

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