CVE-2026-32163
Received Received - Intake
Race Condition in Windows UI Core Enables Local Privilege Escalation

Publication date: 2026-04-14

Last updated on: 2026-04-20

Assigner: Microsoft Corporation

Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-20
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-32163
EUVD
EUVD-2026-22553
Affected Vendors & Products
Showing 20 associated CPEs
Vendor Product Version / Range
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_11_23h2 to 10.0.22631.6936 (exc)
microsoft windows_11_23h2 to 10.0.22631.6936 (exc)
microsoft windows_11_24h2 to 10.0.26100.8246 (exc)
microsoft windows_11_24h2 to 10.0.26100.8246 (exc)
microsoft windows_11_25h2 to 10.0.26200.8246 (exc)
microsoft windows_11_25h2 to 10.0.26200.8246 (exc)
microsoft windows_11_26h1 to 10.0.28000.1836 (exc)
microsoft windows_11_26h1 to 10.0.28000.1836 (exc)
microsoft windows_server_2019 to 10.0.17763.8644 (exc)
microsoft windows_server_2022 to 10.0.20348.5020 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2274 (exc)
microsoft windows_server_2025 to 10.0.26100.32690 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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
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Compliance Impact

This vulnerability allows an authorized attacker to elevate privileges locally by exploiting a race condition in the Windows User Interface Core.

Elevation of privilege vulnerabilities can potentially lead to unauthorized access or modification of sensitive data, which may impact compliance with standards such as GDPR and HIPAA that require strict access controls and protection of personal and health information.

However, the provided information does not explicitly describe the direct effects of this vulnerability on compliance with these regulations.

Executive Summary

This vulnerability is a race condition caused by concurrent execution using a shared resource with improper synchronization in the Windows User Interface Core.

It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who already has some level of access to the system can exploit this vulnerability to gain higher privileges.

This elevation of privilege can lead to full control over the affected system, potentially allowing the attacker to execute arbitrary code, access sensitive data, or disrupt system operations.

Mitigation Strategies

This vulnerability allows an authorized attacker to elevate privileges locally due to a race condition in the Windows User Interface Core.

To mitigate this vulnerability, ensure that your Windows systems are updated with the latest security patches provided by Microsoft.

Since the vulnerability requires local authorization and involves improper synchronization, limiting local access to trusted users and applying principle of least privilege can help reduce risk.

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