7.8

CVE-2025-21333

Warning

Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

Data is provided by the National Vulnerability Database (NVD)
Microsoft ≫ Windows 10 21h2 HwPlatformx64 Version < 10.0.19044.5371
Microsoft ≫ Windows 10 22h2 HwPlatformx64 Version < 10.0.19045.5371
Microsoft ≫ Windows 11 22h2 Version < 10.0.22621.4751
Microsoft ≫ Windows 11 23h2 HwPlatformarm64 Version < 10.0.22621.4751
Microsoft ≫ Windows 11 23h2 HwPlatformx64 Version < 10.0.22631.4751
Microsoft ≫ Windows 11 24h2 Version < 10.0.26100.2894
Microsoft ≫ Windows Server 2022 23h2 HwPlatformx64 Version < 10.0.25398.1369
Microsoft ≫ Windows Server 2025 HwPlatformx64 Version < 10.0.26100.2894

14.01.2025: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability

Vulnerability

Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges.

Description

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 58.03% 0.981
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
secure@microsoft.com 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-122 Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().