CVE-2026-20826
Race Condition in TWINUI Allows Local Privilege Escalation
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | twinui | * |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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]
How can this vulnerability impact me? :
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]
What immediate steps should I take to mitigate this vulnerability?
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]