CVE-2025-49751

Windows Hyper-V Denial of Service Vulnerability

State: Published
Severity: 6.8 Medium
Published: Aug 12, 2025
Updated: Feb 13, 2026
Reserved: Jun 9, 2025

Description

Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	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	microsoft

Weaknesses

CWE-820 Missing Synchronization

Affected Products

Product	Versions
Windows 10 Version 1607Microsoft	10.0.14393.0 to before 10.0.14393.8330Affected
Windows 10 Version 1809Microsoft	10.0.17763.0 to before 10.0.17763.7678Affected
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.6216Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.6216Affected
Windows 11 version 22H2Microsoft	10.0.22621.0 to before 10.0.22621.5768Affected
Windows 11 version 22H3Microsoft	10.0.22631.0 to before 10.0.22631.5768Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.5768Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.4946Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.8330Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.8330Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.7678Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.7678Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.4052Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.1791Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.4946Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.4946Affected

References

Windows Hyper-V Denial of Service Vulnerabilityvendor-advisorypatch

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