CVE-2025-49751: 
vulnerability analysis and mitigation

CVE-2025-49751 is a security vulnerability affecting Windows Hyper-V that was disclosed on August 12, 2025. The vulnerability stems from missing synchronization in Windows Hyper-V, which allows an authorized attacker to execute a denial of service attack over an adjacent network. This vulnerability affects multiple versions of Windows operating systems, including Windows 11, Windows Server 2025, Windows 10, and various Windows Server editions (NVD Database).

The vulnerability has been assigned a CVSS v3.1 base score of 6.8 (Medium severity) with the following vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H. The vulnerability is classified under CWE-820 (Missing Synchronization). The attack requires adjacent network access, low attack complexity, and low privileges, with no user interaction needed (NVD Database).

The primary impact of this vulnerability is the potential for denial of service attacks against Windows Hyper-V systems. When successfully exploited, an attacker with adjacent network access can disrupt the availability of Hyper-V services (NVD Database).

Microsoft has released security updates to address this vulnerability. The fixes are available for affected versions including Windows 11 24H2 (up to version 10.0.26100.4851), Windows Server 2025, Windows 10 (various versions), and multiple Windows Server editions. Users are advised to apply the latest security updates (NVD Database).