Status: UPDATED | Advisory ID: CVE-2026-26174
| CVE | CVE-2026-26174 |
| CVSS Score / Version | 7.0 (High) / CVSS v3.1 |
| Updated | 2026-09-25 |
| CVSS Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is local; attack complexity is high; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | see table below |
| Classified as | CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Microsoft | Windows 11 (version 23H2) | ||
| Microsoft | Windows 11 (version 24H2) | ||
| Microsoft | Windows 11 (version 25H2) | ||
| Microsoft | Windows 11 (version 26H1) | ||
| Microsoft | Windows Server 2025 | ||
| Microsoft | Windows 10 (version 1607) | ||
| Microsoft | Windows 10 (version 1809) | ||
| Microsoft | Windows 10 (version 21H2) | ||
| Microsoft | Windows 10 (version 22H2) | ||
| Microsoft | Windows Server 2012 | ||
| Microsoft | Windows Server 2016 | ||
| Microsoft | Windows Server 2019 | ||
| Microsoft | Windows Server 2022 | ||
| Microsoft | Windows Server 2022 (version 23H2) | ||
| Microsoft | Windows 10 Version 1607 | ||
| Microsoft | Windows 10 Version 1809 | ||
| Microsoft | Windows 10 Version 21H2 | ||
| Microsoft | Windows 10 Version 22H2 | ||
| Microsoft | Windows 11 version 23H2 | ||
| Microsoft | Windows 11 Version 24H2 | ||
| Microsoft | Windows 11 Version 25H2 | ||
| Microsoft | Windows 11 version 26H1 | ||
| Microsoft | Windows Server 2016 (Server Core installation) | ||
| Microsoft | Windows Server 2019 (Server Core installation) | ||
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | ||
| Microsoft | Windows Server 2025 (Server Core installation) | ||
| Microsoft | Windows Server 2012 (Server Core installation) | ||
| Microsoft | Windows Server 2012 R2 | ||
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
| Subsystems | Core Infrastructure, EWS Workstation Delivery/Virtualization |
| Sectors | All Sectors |
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Update Service allows an authorized attacker to elevate privileges locally.
Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.