CVE-2026-21523

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-21523
Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.

8.0 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.1 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21523 Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*
History

11 Feb 2026, 21:41

Type Values Removed Values Added
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21523 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21523 - Vendor Advisory
First Time Microsoft visual Studio Code
Microsoft
CPE cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*

10 Feb 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-10 18:16

Updated : 2026-02-11 21:41

NVD link : CVE-2026-21523

Mitre link : CVE-2026-21523

CVE.ORG link : CVE-2026-21523

JSON object : View

Products Affected

microsoft

  • visual_studio_code
CWE
CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition