CVE-2025-21335

HIGHCVSS 7.8Known Exploited

CISA Known Exploited Vulnerability

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

Remediation deadline: February 4, 2025

Description

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

Timeline

Published:January 14th, 2025 6:15 PM

Last modified:September 24th, 2026 1:10 PM

Added to KEV:January 14th, 2025

CVSS Scoring

CVSS v3: 7.8 (HIGH)

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

Affected Software

From NVD CPE configuration data

Vendors

microsoft

Products

windows_10_21h2windows_10_22h2windows_11_22h2windows_11_23h2windows_11_24h2windows_server_2022_23h2windows_server_2025

Weaknesses (CWE)

References & Reports

Advisories, patches, and third-party reports

Source: NIST NVD · Data may lag official sources by up to one minute