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Description

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker to elevate privileges over a network.

PUBLISHED Reserved 2025-12-11 | Published 2026-02-10 | Updated 2026-02-23 | Assigner microsoft




HIGH: 8.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

Product status

17.14.0 (custom) before 17.14.26
affected

18.3.0 (custom) before 18.3.0
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21257 (GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability) vendor-advisory patch

cve.org (CVE-2026-21257)

nvd.nist.gov (CVE-2026-21257)

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