# CVE-2025-21333

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

- Page: https://www.vulneraibility.com/cve/CVE-2025-21333
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2025-01-14; CISA due date 2025-02-04
- EPSS: 10.07%
- Public exploit code: 1 on Exploit-DB · 4 GitHub proofs of concept (first 2025-02-27)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-01-23)
- Weakness: CWE-122
- Published: 2025-01-14

## Affected versions

- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.5371
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.5371
- Microsoft Windows 11 version 22H2: affected >= 10.0.22621.0 and < 10.0.22621.4751
- Microsoft Windows 11 version 22H3: affected >= 10.0.22631.0 and < 10.0.22631.4751
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.4751
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.2894
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): affected >= 10.0.25398.0 and < 10.0.25398.1369
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.2894
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.2894

A version outside these ranges is not a statement that it is unaffected.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script
- [other] https://www.exploit-db.com/exploits/52436

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.