[ CVE-2025-21333 · Published 14 Jan 2025 ]
Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability
Exploited · CISA KEV CVSS 7.8
EPSS 10%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-01-14
- EPSS: 10% chance of exploitation in the next 30 days (higher than 96% of CVEs)
[ Description ]Official description
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
CISA: Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 4 Feb 2025): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333PatchVendor Advisory
- www.exploit-db.com/exploits/52436ExploitThird Party AdvisoryVDB Entry
- www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hy…MitigationThird Party Advisory
- www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hy…MitigationThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource