Vulnerability · Published Aug 12, 2025 · Assigned by microsoft
CVE-2025-49751Windows Hyper-V Denial of Service Vulnerability
Medium 6.8
In plain English
A medium-severity security flaw in Windows 10 Version 1607 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.5%top 54.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – before 10.0.14393.8330 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – before 10.0.17763.7678 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.6216 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.6216 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 – before 10.0.22621.5768 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – before 10.0.22631.5768 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.5768 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.4946 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.8330 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.8330 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.7678 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.7678 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.4052 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.1791 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.4946 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.4946 |
Weakness: CWE-820 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C
References
- Windows Hyper-V Denial of Service Vulnerability vendor-advisory, patch