PT-2026-58120 · Microsoft · Windows File Explorer

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-40422

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows File Explorer (affected versions not specified)

Description The use of an uninitialized resource in Windows File Explorer allows an authorized attacker with local access to disclose information locally.

Fix

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2026-40422

Affected Products

Windows File Explorer

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-40422 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40422 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40422 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-40422 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077217122430681148 · Twitter Post