CVE-2025-21335
Microsoft Windows 10 Version 21H2, Microsoft Windows 10 Version 22H2, Microsoft Windows 11 version 22H2
Published 14 Jan 2025 · updated 24 Sept 2026 · Analyzed
7.8 High · CVSS 3.1, microsoft.com
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 14 Jan 2025, with a remediation deadline of 4 Feb 2025 for US federal agencies.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21335 · Patch, Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21335 · US Government Resource