High severity · published Feb 10, 2026
CVE-2026-21257
GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
8.0
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MV
Microsoft Visual Studio 2022 version 17.14 · Microsoft
17.14.0 before 17.14.26 · source: vendor
MV
Microsoft Visual Studio 2026 version 18.3 · Microsoft
18.3.0 before 18.3.0 · source: vendor
VS
Visual Studio 2022 · Microsoft
17.14.0 before 17.14.26 · source: NVD
Affected product
MV
Microsoft Visual Studio 2022 version 17.14
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21257
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21257
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21257
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