high7.8Known exploitedPublic exploit code
CVE-2025-21333
Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2025-01-14. Federal due date: 2025-02-04.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- Microsoft Windows Server 2025 Hyper-V NT Kernel Integration VSP - Elevation of Privilege2025-09-16 · local · windows
Impact
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 21h2 | before 10.0.19044.5371 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.5371 |
| Microsoft | Windows 11 22h2 | before 10.0.22621.4751 |
| Microsoft | Windows 11 23h2 | before 10.0.22631.4751 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.2894 |
| Microsoft | Windows Server 2022 23h2 | before 10.0.25398.1369 |
| Microsoft | Windows Server 2025 | before 10.0.26100.2894 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333
- https://www.exploit-db.com/exploits/52436
- https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script
- https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333