CVE-2021-43907: Visual Studio Code WSL Extension Remote Code Execution Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-15 · updated 2026-06-17

Description

Visual Studio Code WSL Extension Remote Code Execution Vulnerability

Affected products

Microsoft Windows Subsystem for Linux (WSL2): before 0.63.11 — fixed in 0.63.11
Microsoft Visual Studio Code WSL Extension: before 0.63.11 — fixed in 0.63.11

How to fix

Upgrade to a fixed version: Microsoft Windows Subsystem for Linux (WSL2) 0.63.11; Microsoft Visual Studio Code WSL Extension 0.63.11. Check the vendor advisory for mitigations.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43907
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43907

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