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Vulnerability record · CVE-2021-43907 · published 15 December 2021

CVE-2021-43907: Microsoft windows subsystem for linux vulnerability

Microsoft · Windows Subsystem For Linux

Visual Studio Code WSL Extension Remote Code Execution Vulnerability

9.8 CVSS 3.1 Critical EPSS 3.8% · top 10.4%
9.8CVSS 3.1 base score, v2 10.0
3.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Visual Studio Code WSL Extension Remote Code Execution Vulnerability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2025-62220Microsoft windows subsystem for linux heap-based buffer overflow vulnerabilityHeap-based buffer overflow in Windows Subsystem for Linux GUI allows an unauthorized attacker to execute code over a network.EPSS 0.67%7.8CVE-2026-57968Microsoft windows subsystem for linux vulnerabilityBuffer over-read in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.EPSS 0.33%7.8CVE-2022-44689Microsoft windows subsystem for linux improper privilege management vulnerabilityWindows Subsystem for Linux (WSL2) Kernel Elevation of Privilege VulnerabilityEPSS 0.49%7.0CVE-2025-53788Microsoft windows subsystem for linux toctou race condition vulnerabilityTime-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.EPSS 0.23%7.0CVE-2022-38014Microsoft azure iot edge for linux race condition vulnerabilityWindows Subsystem for Linux (WSL2) Kernel Elevation of Privilege VulnerabilityEPSS 0.34%4.7CVE-2026-57973Microsoft windows subsystem for linux toctou race condition vulnerabilityTime-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally.EPSS 0.22%

Source: NIST National Vulnerability Database (record CVE-2021-43907), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.