SB20260414140 - Multiple vulnerabilities in Microsoft Brokering File System

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2026-26181)

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Brokering File System. A local user can gain elevated privileges on the target system.

2) Race condition (CVE-ID: CVE-2026-32091)

The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to a race condition in Microsoft Brokering File System. A local attacker can exploit the race and escalate privileges on the system.

3) Double free (CVE-ID: CVE-2026-32219)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in Microsoft Brokering File System. A local user can win a race condition and gain elevated privileges on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26181
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32091
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32219