CVE-2026-21523

Published Feb 10, 2026

Last updated a month ago

Overview

Description
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.
Source
secure@microsoft.com
NVD status
Analyzed
Products
visual_studio_code

Risk scores

CVSS 3.1

Type
Primary
Base score
8
Impact score
5.9
Exploitability score
2.1
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-367

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.