CVE-2025-49751
Windows Hyper-V Denial of Service Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium6.8 | 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 |
| NVDNVD · Analyzed | 3.1 | Medium6.8 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.8330
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.7678
Microsoft · Windows 10 Version 21H2
- affected 10.0.19044.0 – < 10.0.19044.6216
Microsoft · Windows 10 Version 22H2
- affected 10.0.19045.0 – < 10.0.19045.6216
Microsoft · Windows 11 version 22H2
- affected 10.0.22621.0 – < 10.0.22621.5768
Microsoft · Windows 11 version 22H3
- affected 10.0.22631.0 – < 10.0.22631.5768
Microsoft · Windows 11 Version 23H2
- affected 10.0.22631.0 – < 10.0.22631.5768
Microsoft · Windows 11 Version 24H2
- affected 10.0.26100.0 – < 10.0.26100.4946
Microsoft · Windows Server 2016
- affected 10.0.14393.0 – < 10.0.14393.8330
Microsoft · Windows Server 2016 (Server Core installation)
- affected 10.0.14393.0 – < 10.0.14393.8330
Microsoft · Windows Server 2019
- affected 10.0.17763.0 – < 10.0.17763.7678
Microsoft · Windows Server 2019 (Server Core installation)
- affected 10.0.17763.0 – < 10.0.17763.7678
Microsoft · Windows Server 2022
- affected 10.0.20348.0 – < 10.0.20348.4052
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)
- affected 10.0.25398.0 – < 10.0.25398.1791
Microsoft · Windows Server 2025
- affected 10.0.26100.0 – < 10.0.26100.4946
Microsoft · Windows Server 2025 (Server Core installation)
- affected 10.0.26100.0 – < 10.0.26100.4946
References (1)
- Windows Hyper-V Denial of Service Vulnerability (opens in a new tab)vendor-advisorypatch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-49751)Record last updated .