CVE-2026-20826
Unknown Unknown - Not Provided
Race Condition in TWINUI Allows Local Privilege Escalation

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-01-13
Last Modified
2026-01-13
Generated
2026-06-16
AI Q&A
2026-01-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20826
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft twinui *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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Executive Summary

This vulnerability is a race condition in the Tablet Windows User Interface (TWINUI) Subsystem where concurrent execution uses a shared resource without proper synchronization. This flaw allows an authorized attacker to elevate their privileges locally on the affected system. [1]

Impact Analysis

An attacker who already has some level of access can exploit this vulnerability to gain higher privileges on the system. This elevation of privilege can lead to unauthorized actions, potentially compromising system integrity, confidentiality, and availability. [1]

Mitigation Strategies

Apply the security updates provided by Microsoft for the Tablet Windows User Interface (TWINUI) Subsystem to address the race condition vulnerability that allows local privilege escalation. [1]

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