PT-2026-32773 · Microsoft · Windows User Interface Core+1

Published 2026-04-14 · Updated 2026-04-15 · CVE-2026-27911

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows User Interface Core (affected versions not specified)

Description A race condition, which occurs when multiple processes access a shared resource simultaneously without proper synchronization, exists in Windows User Interface Core. This allows an authorized attacker to elevate privileges locally.

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:2026-05355

CVE-2026-27911

Affected Products

Windows

Windows User Interface Core

References · 6

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-27911 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27911 · Security Note
• https://bdu.fstec.ru/vul/2026-05355 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27911 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27911 · Security Note
• https://twitter.com/CVEnew/status/2044358608293384607 · Twitter Post