CVE-2025-49751
Windows Hyper-V Denial of Service Vulnerability
CVE-2025-49751 is fixed in 19 products on 1 platform, first by KB5063871, released August 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0054
45th percentile
<p>Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for x64-based Systems | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows 10 Version 1809 for x64-based Systems | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows 10 Version 21H2 for x64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 11 Version 22H2 for ARM64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 22H2 for x64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 23H2 for ARM64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 23H2 for x64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows Server 2016 | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows Server 2016 (Server Core installation) | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows Server 2019 | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows Server 2019 (Server Core installation) | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows Server 2022 | 20348.4052 | KB5063880 | Aug 12, 2025 |
| Windows Server 2022 | 20348.3989 | KB5063812 | Aug 12, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.4052 | KB5063880 | Aug 12, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.3989 | KB5063812 | Aug 12, 2025 |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.1791 | KB5063899 | Aug 12, 2025 |
| Windows Server 2025 | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows Server 2025 | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.4851 | KB5064010 | Aug 12, 2025 |
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