CVE-2025-21333

Microsoft Windows 10 Version 21H2, Microsoft Windows 10 Version 22H2, Microsoft Windows 11 version 22H2

Published 14 Jan 2025 · updated 17 Jun 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-2025-21333 · Patch, Vendor Advisory
www.exploit-db.com/exploits/52436 · Exploit, Third Party Advisory, VDB Entry
www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script · Mitigation, Third Party Advisory
www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script · Mitigation, Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333 · US Government Resource