---
id: CVE-2025-21335
title: Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
summary: Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: microsoft
product: windows_10_21h2
affected:
  - windows_10_21h2 < 10.0.19044.5371
  - windows_10_22h2 < 10.0.19045.5371
  - windows_11_22h2 < 10.0.22621.4751
  - windows_11_23h2 < 10.0.22631.4751
  - windows_11_24h2 < 10.0.26100.2894
  - windows_server_2022_23h2 < 10.0.25398.1369
  - windows_server_2025 < 10.0.26100.2894
patched:
  - windows_10_21h2 10.0.19044.5371
  - windows_10_22h2 10.0.19045.5371
  - windows_11_22h2 10.0.22621.4751
  - windows_11_23h2 10.0.22631.4751
  - windows_11_24h2 10.0.26100.2894
  - windows_server_2022_23h2 10.0.25398.1369
  - windows_server_2025 10.0.26100.2894
published: '2025-01-14'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:10:00.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-21335'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21335'
    label: secure@microsoft.com
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21335
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
epss: 0.0139
epssPercentile: 0.71122
kev: true
kevDateAdded: '2025-01-14'
kevDueDate: '2025-02-04'
kevRansomware: false
exploited: true
zeroDay: true
ingestedAt: '2026-09-24T13:43:25.651Z'
---

## Overview

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

## Affected

- `windows_10_21h2 < 10.0.19044.5371`
- `windows_10_22h2 < 10.0.19045.5371`
- `windows_11_22h2 < 10.0.22621.4751`
- `windows_11_23h2 < 10.0.22631.4751`
- `windows_11_24h2 < 10.0.26100.2894`
- `windows_server_2022_23h2 < 10.0.25398.1369`
- `windows_server_2025 < 10.0.26100.2894`

## Remediation

Upgrade past the affected range:

- `windows_10_21h2 10.0.19044.5371`
- `windows_10_22h2 10.0.19045.5371`
- `windows_11_22h2 10.0.22621.4751`
- `windows_11_23h2 10.0.22631.4751`
- `windows_11_24h2 10.0.26100.2894`
- `windows_server_2022_23h2 10.0.25398.1369`
- `windows_server_2025 10.0.26100.2894`