PT-2026-2676 · Microsoft · Tablet Windows User Interface+1

Published 2026-01-13 · Updated 2026-01-17 · CVE-2026-20826

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 Tablet Windows User Interface (TWINUI) Subsystem (affected versions not specified)

Description A flaw exists due to concurrent execution using a shared resource with improper synchronization, creating a race condition within the Tablet Windows User Interface (TWINUI) Subsystem. This condition 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.

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-00490

CVE-2026-20826

Affected Products

Tablet Windows User Interface

Windows

References · 8

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20826 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20826 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-20826 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20826 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20826 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00490 · Security Note
• https://cybersecurity-help.cz/vdb/SB2026011386 · Note
• https://twitter.com/CVEnew/status/2012490415404884400 · Twitter Post