CVE-2026-21257
published 2026-02-10CVE-2026-21257: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker to…
PriorityP352high8CVSS 3.1
AVNACLPRLUIRSUCHIHAH
EPSS
0.84%
53.7th percentile
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
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_visual_studio_2022_version_17.14 | >= 17.14.0 < 17.14.26 | 17.14.26 |
| microsoft | microsoft_visual_studio_2026_version_18.3 | >= 18.3.0 < 18.3.0 | 18.3.0 |
| microsoft | visual_studio_2022 | >= 17.14.0 < 17.14.26 | 17.14.26 |
| msrc | microsoft_visual_studio_2022_version_17.14 | — | — |
| msrc | microsoft_visual_studio_2026_version_18.3 | — | — |
CVSS provenance
nvdv3.18.0HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
vendor_msrc8.0HIGH
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Microsoft
GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
vendor_msrc·2026-02-10·CVSS 8.0
CVE-2026-21257 [HIGH] CWE-77 GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability
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.
FAQ: What privileges could be gained by an attacker who successfully exploited the vulnerability?
The attacker would gain the rights of the user that is running the affected application.
GitHub Copilot and Visual Studio: GitHub Copilot and Visual Studio
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Elevation of Privilege
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
Remediation: Release Notes
Reference: https://my.visualstudio.com/Downloads?q=Visual
GHSA
GHSA-g435-352v-fpxp: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker
ghsa_unreviewed·2026-02-10
CVE-2026-21257 [HIGH] CWE-77 GHSA-g435-352v-fpxp: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker
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.
No detection rules found.
No public exploits indexed.
Sophos
February’s Patch Tuesday assumes battle stations
blogs_sophos·2026-02-13
February’s Patch Tuesday assumes battle stations
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Bleepingcomputer
Microsoft February 2026 Patch Tuesday fixes 6 zero-days, 58 flaws
blogs_bleepingcomputer·2026-02-10·CVSS 8.8
[HIGH] Microsoft February 2026 Patch Tuesday fixes 6 zero-days, 58 flaws
## Microsoft February 2026 Patch Tuesday fixes 6 zero-days, 58 flaws
## Lawrence Abrams
25 Elevation of Privilege vulnerabilities
5 Security Feature Bypass vulnerabilities
12 Remote Code Execution vulnerabilities
6 Information Disclosure vulnerabilities
3 Denial of Service vulnerabilities
7 Spoofing vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include 3 Microsoft Edge flaws fixed earlier this month.
As part of these updates, Microsoft has also begun to roll out updated Secure Boot certificates to replace the original 2011 certificates that are expiring in late June 2026.
"With this update, Windows quality updates include a broad set of targeting data that i
Wiz
CVE-2026-21257 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 4.8
CVE-2026-21257 [MEDIUM] CVE-2026-21257 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-21257 :
Visual Studio 2022 vulnerability analysis and mitigation
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.
Source : NVD
## 8
Score
Published February 10, 2026
Severity HIGH
CNA Score 8.0
Affected Technologies
Visual Studio 2022
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 12.2
Exploitation Probability (EPSS) N/A
Affected packages and libraries
cpe:2.3:a:microsoft:visual_studio_2022
Sources
Windows Severity HIGH Has Fix Added at: Feb 11, 2026
Windows Severity HIGH Has Fix Added at: Feb 12, 2026
## Get a CVE risk assessme
Wiz
CVE-2026-21256 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 4.8
CVE-2026-21256 [MEDIUM] CVE-2026-21256 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-21256 :
Visual Studio 2022 vulnerability analysis and mitigation
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.
Source : NVD
## 8.8
Score
Published February 10, 2026
Severity HIGH
CNA Score 8.8
Affected Technologies
Visual Studio 2022
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 12
Exploitation Probability (EPSS) N/A
Affected packages and libraries
cpe:2.3:a:microsoft:visual_studio_2022
Sources
Windows Severity HIGH Has Fix Added at: Feb 11, 2026
Windows Severity HIGH Has Fix Added at: Feb 12, 2026
## Get a CVE risk assessment
Sophos
February’s Patch Tuesday assumes battle stations
blogs_sophos
February’s Patch Tuesday assumes battle stations
Share This
Microsoft on Tuesday released 58 patches affecting 15 product families. Five of the addressed issues, all involving Azure, are considered by Microsoft to be of Critical severity, though only two require urgent attention (more on that below). Fifteen have a CVSS base score of 8.0 or higher, including two with a 9.8 base score. Six are known to be under active exploit in the wild, and three are publicly disclosed (including one not yet known to be under exploit).
At patch time, five CVEs are judged more likely to be exploited in the next 30 days by the company’s estimation, in addition to the six already detected to be so. Various of this month’s issues are amenable to direct detection by Sophos protections, and we include information on those in a table below. The release also
2026-02-10
Published