CVE-2025-53155: 
vulnerability analysis and mitigation

A heap-based buffer overflow vulnerability was discovered in Windows Hyper-V (CVE-2025-53155), disclosed on August 12, 2025. The vulnerability affects multiple versions of Windows Server and Windows operating systems, allowing an authorized attacker to elevate privileges locally (NVD).

The vulnerability is classified as a heap-based buffer overflow (CWE-122) in Windows Hyper-V. Microsoft has assigned a CVSS v3.1 base score of 7.8 (High) with the following vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access, low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability (NVD).

The vulnerability can lead to local privilege elevation, potentially allowing an authorized attacker to gain elevated access to affected systems. This impacts multiple Windows versions including Windows Server 2012, 2016, 2019, 2022, 2025, and various Windows 10 and 11 releases (NVD).

Microsoft has released security updates to address this vulnerability across affected versions. The patches are available for Windows Server 2012 through 2025, and Windows 10/11 versions. System administrators should apply the relevant updates to mitigate this vulnerability (NVD).

The vulnerability was included in Microsoft's August 2025 Patch Tuesday release along with other Hyper-V related security fixes. It was one of five vulnerabilities addressed for the Windows Hyper-V role during this update cycle (Fortra).