Detections
Analytics

Microsoft Windows Subsystem for Linux (WSL2) < 2.7.10 Tampering (CVE-2026-57973) (July 2026)

medium Nessus Plugin ID 326869

Synopsis

Microsoft Windows Subsystem for Linux (WSL2) is affected by a tampering vulnerability.

Description

The version of Microsoft Windows Subsystem for Linux (WSL2) on the remote Windows host is prior to 2.7.10. It is, therefore, affected by a tampering vulnerability:

 - Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally. (CVE-2026-57973)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Microsoft Windows Subsystem for Linux (WSL2) version 2.7.10 or later via the Microsoft Store.

See Also

http://www.nessus.org/u?5cac4ff9

Plugin Details

Severity: Medium

ID: 326869

File Name: microsoft_windows_subsystem_for_linux_CVE-2026-57973.nasl

Version: 1.2

Type: Local

Agent: windows

Family: Windows

Published: 7/14/2026

Updated: 7/15/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.69

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-57973

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.5

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:windows_subsystem_for_linux

Required KB Items: installed_sw/MicrosoftCorporationII.WindowsSubsystemForLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-57973