HIGH
CVE-2025-21333
CVSS
7.8
KEV
Description
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
Summary dbcve.org
This is a local elevation of privilege vulnerability in Windows Hyper-V's NT Kernel Integration Virtual Service Provider (VSP). The vulnerability allows an authenticated local attacker to gain elevated privileges on the affected system through the kernel integration component used for host-guest communication.
Mitigation
Apply the Microsoft security update for CVE-2025-21333 via Windows Update or Microsoft Update Catalog. For Hyper-V environments, ensure both the host and guest integration services are patched.
Weakness (CWE)
CWE-122
Heap-based Buffer Overflow
EPSS Score
9.99%
Probability of exploitation in next 30 days
95.5th percentile
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333
Patch, Vendor Advisory
https://www.exploit-db.com/exploits/52436
Exploit, Third Party Advisory, VDB Entry
https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script
Mitigation, Third Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script
Mitigation, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333
US Government Resource
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.