PT-2026-58435 · Microsoft · Brokering File System

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-50458

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/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 use after free issue exists in the Microsoft Brokering File System. This flaw allows an authorized attacker to perform a local privilege escalation, effectively bypassing security boundaries to gain higher-level access to the system.

Recommendations Install update KB5101650.

Fix

Use After Free

Race Condition

Weakness Enumeration

CWE-416

CWE-362

Related Identifiers

CVE-2026-50458

Affected Products

Brokering File System

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50458 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-50458 · Security Note
• https://twitter.com/windowsforum/status/2077351755981934813 · Twitter Post