CVE-2025-54091
Windows Hyper-V Elevation of Privilege Vulnerability
CVE-2025-54091 is fixed in 24 products on 1 platform, first by KB5065427, released September 9, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0045
39th percentile
<p>Integer overflow or wraparound in Windows Hyper-V allows an authorized attacker to elevate privileges locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for x64-based Systems | 14393.8422 | KB5065427 | Sep 9, 2025 |
| Windows 10 Version 1809 for x64-based Systems | 17763.7792 | KB5065428 | Sep 9, 2025 |
| Windows 10 Version 21H2 for x64-based Systems | KB5065429 | Sep 9, 2025 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5065429 | Sep 9, 2025 | |
| Windows 10 for x64-based Systems | 10240.21128 | KB5065430 | Sep 9, 2025 |
| Windows 11 Version 22H2 for ARM64-based Systems | KB5065431 | Sep 9, 2025 | |
| Windows 11 Version 22H2 for x64-based Systems | KB5065431 | Sep 9, 2025 | |
| Windows 11 Version 23H2 for ARM64-based Systems | KB5065431 | Sep 9, 2025 | |
| Windows 11 Version 23H2 for x64-based Systems | KB5065431 | Sep 9, 2025 | |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.6584 | KB5065426 | Sep 9, 2025 |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.6508 | KB5065474 | Sep 9, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.6584 | KB5065426 | Sep 9, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.6508 | KB5065474 | Sep 9, 2025 |
| Windows Server 2012 | KB5065509 | Sep 9, 2025 | |
| Windows Server 2012 (Server Core installation) | KB5065509 | Sep 9, 2025 | |
| Windows Server 2012 R2 | KB5065507 | Sep 9, 2025 | |
| Windows Server 2012 R2 (Server Core installation) | KB5065507 | Sep 9, 2025 | |
| Windows Server 2016 | 14393.8422 | KB5065427 | Sep 9, 2025 |
| Windows Server 2016 (Server Core installation) | 14393.8422 | KB5065427 | Sep 9, 2025 |
| Windows Server 2019 | 17763.7792 | KB5065428 | Sep 9, 2025 |
| Windows Server 2019 (Server Core installation) | 17763.7792 | KB5065428 | Sep 9, 2025 |
| Windows Server 2022 | 20348.4171 | KB5065432 | Sep 9, 2025 |
| Windows Server 2022 | 20348.4106 | KB5065306 | Sep 9, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.4171 | KB5065432 | Sep 9, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.4106 | KB5065306 | Sep 9, 2025 |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.1849 | KB5065425 | Sep 9, 2025 |
| Windows Server 2025 | 26100.6584 | KB5065426 | Sep 9, 2025 |
| Windows Server 2025 | 26100.6508 | KB5065474 | Sep 9, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.6584 | KB5065426 | Sep 9, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.6508 | KB5065474 | Sep 9, 2025 |
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