CVE-2025-21335

7.8

HIGH CVSS 3.1

Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability - [Actively Exploited]

Description

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

INFO

Published Date :

Jan. 14, 2025, 6:15 p.m.

Last Modified :

Jan. 15, 2025, 8:24 p.m.

Remotely Exploit :

No

Source :

[email protected]

CISA Notification

CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Due Date: Feb 04, 2025

Alert Date: Jan 14, 2025 | 226 days ago

Description :

Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

Required Action :

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

Notes :

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21335 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21335

Affected Products

The following products are affected by CVE-2025-21335 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product
1	Microsoft	windows_10_21h2
2	Microsoft	windows_10_22h2
3	Microsoft	windows_11_22h2
4	Microsoft	windows_11_23h2
5	Microsoft	windows_server_2022_23h2
6	Microsoft	windows_server_23h2
7	Microsoft	windows_11_24h2
8	Microsoft	windows_server_2025

: Total Affected Vendor : 1 | Products : 8

CVSS Scores

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Score	Version	Severity	Vector	Exploitability Score	Impact Score	Source
	CVSS 3.1	HIGH				[email protected]

Solution

Apply vendor security updates to address the Hyper-V NT Kernel Integration VSP elevation of privilege vulnerability.

Update Windows to the latest version.
Install security patches for Hyper-V.
Review Hyper-V security configurations.

Public PoC/Exploit Available at Github

CVE-2025-21335 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-21335.

URL	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21335	Patch Vendor Advisory

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-21335 is associated with the following CWEs:

CWE-416: Use After Free

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-21335 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

ums91/CISA_BOT

CISA Bot is a GitHub bot that automatically monitors the Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) Catalog. When new vulnerabilities are published in the KEV, the bot creates GitHub issues in this repository with detailed information about each vulnerability.

Python

Updated: 1 day, 11 hours ago

2 stars 1 fork 1 watcher

Born at : Oct. 29, 2024, 10:19 a.m. This repo has been linked 205 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-21335 vulnerability anywhere in the article.

Help Net Security

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Published Date: Apr 17, 2025 (4 months, 1 week ago)

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tripwire.com

Tripwire Patch Priority Index for January 2025

Tripwire's January 2025 Patch Priority Index (PPI) brings together important vulnerabilities for Microsoft.First on the list are patches for the Microsoft office platform, including Word, Access, Visi ...

Published Date: Feb 04, 2025 (6 months, 3 weeks ago)

CrowdStrike.com

January 2025 Patch Tuesday: 10 Critical Vulnerabilities and Eight Zero-Days Among 159 CVEs

Microsoft has released security updates for 159 vulnerabilities in its January 2025 Patch Tuesday rollout. Among these are 10 Critical vulnerabilities and eight zero-days affecting the Windows Hyper-V ...

Published Date: Jan 30, 2025 (6 months, 4 weeks ago)

CrowdStrike.com

January 2025 Patch Tuesday: 10 Critical Vulnerabilities and Eight Zero-Days Among 159 CVEs

Published Date: Jan 30, 2025 (6 months, 4 weeks ago)

CrowdStrike.com