Missing Synchronization in Microsoft Windows and Windows Server - CVE-2025-49751

Vulnerability identifier: #VU113843

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-49751

CWE-ID: CWE-820

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to missing synchronization in Windows Hyper-V. A remote user on the local network can cause a denial of service condition on the target system.

Microsoft Windows
Windows Server

Install update from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.6216, 10 22H2 10.0.19045.6216, 10 1607 10.0.14393.8330, 10 1809 10.0.17763.7678, 11 22H2 10.0.22621.5768, 11 23H2 10.0.22631.5768, 11 24H2 10.0.26100.4851, 11 24H2 10.0.26100.4946
Windows Server - addressed in versions 2016 10.0.14393.8330, 2019 10.0.17763.7678, 2022 23H2 10.0.25398.1791, 2022 10.0.20348.3989, 2022 10.0.20348.4052, 2025 10.0.26100.4851, 2025 10.0.26100.4946

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-49751

• Multiple vulnerabilities in Microsoft Windows Hyper-V