CVE-2026-27911

HighCVSS 7.8/10Last modified Oct 26, 2026

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-362CWE-416

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1607>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows 10 Version 1809>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows 10 Version 21H2>= 10.0.19044.0, < 10.0.19044.7184
MicrosoftWindows 10 Version 22H2>= 10.0.19045.0, < 10.0.19045.7184
MicrosoftWindows 11 version 23H2>= 10.0.22631.0, < 10.0.22631.6936
MicrosoftWindows 11 Version 23H2>= 10.0.22631.0, < 10.0.22631.6936
MicrosoftWindows 11 Version 24H2>= 10.0.26100.0, < 10.0.26100.8246
MicrosoftWindows 11 Version 25H2>= 10.0.26200.0, < 10.0.26200.8246
MicrosoftWindows 11 version 26H1>= 10.0.28000.0, < 10.0.28000.1836
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.5020
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)>= 10.0.25398.0, < 10.0.25398.2274
MicrosoftWindows Server 2025>= 10.0.26100.0, < 10.0.26100.32690
MicrosoftWindows Server 2025 (Server Core installation)>= 10.0.26100.0, < 10.0.26100.32690

References

Timeline

Published
Apr 14, 2026
Last modified
Oct 26, 2026
NVD status
Analyzed

Related CVEs from 2026

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CVE-2026-27911: High severity, CVSS 7.8 | Vulnix