# 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.

- **CVSS:** 8 (HIGH)
- **EPSS:** 0.0%
- **CWE:** CWE-367

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-21523
Full threat coverage + IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp