PT-2026-32817 · Microsoft · Brokering File System+1

Published 2026-04-14 · Updated 2026-04-15 · CVE-2026-32091

Positive Technologies (AI Summary)

CVSS v3.1

8.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Brokering File System (affected versions not specified)

Description A race condition occurs due to improper synchronization when using a shared resource in the Microsoft Brokering File System. This allows an unauthorized attacker to break file-system boundaries and elevate privileges locally, potentially gaining SYSTEM level access.

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

Use After Free

Race Condition

Weakness Enumeration

CWE-416

CWE-362

Related Identifiers

BDU:2026-05362

CVE-2026-32091

Affected Products

Brokering File System

Windows

References · 7

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-32091 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05362 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32091 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-32091 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-32091 · Security Note
• https://twitter.com/windowsforum/status/2044179624955944973 · Twitter Post
• https://twitter.com/CVEnew/status/2044358584750813342 · Twitter Post