SB2026041509 - Multiple vulnerabilities in Microsoft Windows User Interface Core

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Race condition (CVE-ID: CVE-2026-27911)

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

The vulnerability exists due to a race condition in Windows User Interface Core. A local user can exploit the race and escalate privileges on the system.

2) Use-after-free (CVE-ID: CVE-2026-32165)

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Windows User Interface Core. A local user can win a race condition and gain elevated privileges on the target system.

3) Race condition (CVE-ID: CVE-2026-32163)

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

The vulnerability exists due to a race condition in Windows User Interface Core. A local user can exploit the race and escalate privileges on the system.

4) Race condition (CVE-ID: CVE-2026-32164)

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

The vulnerability exists due to a race condition in Windows User Interface Core. A local user can exploit the race and escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27911
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32165
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32163
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32164