PT-2026-32743 · Microsoft · Windows Shell+1

Published 2026-04-14 · Updated 2026-04-25 · CVE-2026-26166

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

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

Description A double free issue in Windows Shell allows an authorized attacker to elevate privileges locally, enabling a user to gain administrative access to the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BDU:2026-05470

CVE-2026-26166

Affected Products

Windows

Windows Shell

References · 8

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-26166 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26166 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-26166 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26166 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05470 · Security Note
• https://twitter.com/CVEnew/status/2045112990412976614 · Twitter Post
• https://twitter.com/windowsforum/status/2044114140583653590 · Twitter Post
• https://twitter.com/giuseppe_1337/status/2047849388836344062 · Twitter Post