CVE-2025-53155: Windows Hyper-V Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Aug

Released

2025-08-12

EPSS Score

0.07% (percentile: 22.1%)

Description

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

FAQ

How could an attacker exploit this vulnerability? An authenticated attacker could create a crafted vhdx file and can call the vhdmp api with vhdx as one of the arguments. What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Affected Products (24)

Windows

• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows 10 Version 21H2 for x64-based Systems
• Windows Server 2025 (Server Core installation)
• Windows 11 Version 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows Server 2025
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

ESU

• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 11 Version 22H2 for x64-based Systems
• Windows 10 Version 22H2 for x64-based Systems
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (12)

• 5063877
• 5063880
• 5063812
• 5063709
• 5063875
• 5063878
• 5064010
• 5063899
• 5063889
• 5063871
• 5063906
• 5063950

Acknowledgments

Do Manh Dung & Nguyen Dang Nguyen of STAR Labs SG Pte. Ltd. (<a href=https://x.com/starlabs_sg>@starlabs_sg</a>) working with Trend Zero Day Initiative, Do Manh Dung & Nguyen Dang Nguyen of STAR Labs SG Pte. Ltd. (<a href=https://x.com/starlabs_sg>@starlabs_sg</a>) working with Trend Zero Day Initiative

Revision History

• 2025-08-12: Information published.