Vulnerability · Published Feb 10, 2026 · Assigned by microsoft
CVE-2026-21257GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
High 8.0
In plain English
A high-severity command injection in Microsoft Visual Studio 2022 version 17.14 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.9%top 40.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.26 |
| Microsoft | Microsoft Visual Studio 2026 version 18.3 | 18.3.0 – before 18.3.0 |
Weakness: CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability vendor-advisory, patch