Vulnerability · Published Feb 10, 2026 · Assigned by microsoft
CVE-2026-21256GitHub Copilot and Visual Studio Remote Code Execution Vulnerability
High 8.8
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 1.2% (higher than 67% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.2%top 32.8% 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 unauthorized attacker to execute code 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, CWE-94 · 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
References
- GitHub Copilot and Visual Studio Remote Code Execution Vulnerability vendor-advisory, patch