CVE-2025-49751: Windows Hyper-V Denial of Service Vulnerability

Published Aug 12, 2025
·
Updated

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

Other sources

Windows Hyper-V Denial of Service Vulnerability

Microsoft

Affected Software

31 affected componentsFixes available
Microsoft Windows Server 2016
Microsoft Windows Server 2016
Microsoft Windows Server 2025
Microsoft Windows 10=1607
Microsoft Windows 11=24H2
Microsoft Windows Server 2022, 23H2 Edition
Microsoft Windows Server 2025
Microsoft Windows 11=23H2
Microsoft Windows 11=23H2
Microsoft Windows 11=24H2
Microsoft Windows 11=22H2
Microsoft Windows 10=22H2
Microsoft Windows 11=22H2
Microsoft Windows 10=21H2
Microsoft Windows Server 2022
Microsoft Windows Server 2019
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows 10=1809
Microsoft Windows 10 1607<10.0.14393.8330
Microsoft Windows 10 1809<10.0.17763.7678
Microsoft Windows 10 21h2<10.0.19044.6216
Microsoft Windows 10 22h2<10.0.19045.6216
Microsoft Windows 11 22h2<10.0.22621.5768
Microsoft Windows 11 23h2<10.0.22631.5768
Microsoft Windows 11 24h2<10.0.26100.4851
Microsoft Windows Server 2016<10.0.14393.8330
Microsoft Windows Server 2019<10.0.17763.7678
Microsoft Windows Server 2022<10.0.20348.3989
Microsoft Windows Server 2022 23h2<10.0.25398.1791
Microsoft Windows Server 2025<10.0.26100.4851

Event History

Aug 12, 2025
CVE Published
via Microsoft·07:00 AM
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·07:00 AM
Affected Software
Updated
via Microsoft·07:00 AM
Description
CVE Published
via MITRE·05:09 PM
Data Sourced
via MITRE·05:09 PM
DescriptionSeverity
Data Sourced
via NVD·06:15 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2025-49751?

CVE-2025-49751 has a medium severity rating, indicating a recognizable but manageable risk for systems running affected software.

2

How do I fix CVE-2025-49751?

To remediate CVE-2025-49751, apply the latest security patches provided by Microsoft for the affected Windows products.

3

Which products are affected by CVE-2025-49751?

CVE-2025-49751 affects various versions of Windows Server and Windows 10 and Windows 11, including 2016, 2019, 2022, 2025, and specific versions of Windows 10 and 11.

4

What type of vulnerability is CVE-2025-49751?

CVE-2025-49751 is a denial of service vulnerability that can be exploited by an attacker to disrupt services on Windows Hyper-V.

5

Can I verify if my system is vulnerable to CVE-2025-49751?

Yes, you can check your system configuration and installed updates against the list of affected products for CVE-2025-49751 to determine vulnerability.

Contact

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