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7.8 High Exploited

CVE-2025-21333 Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability

Active exploitation observed

· CISA KEV catalogue
Required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns Not observed so far
Weakness CWE-122

Description

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

Affected products and versions

Product Affected versions Fixed in
Windows 10 Version 21H2 10.0 10.0.19044.0 → < 10.0.19044.5371 10.0.19044.5371
Windows 11 version 22H2 10.0 10.0.22621.0 → < 10.0.22621.4751 10.0.22621.4751
Windows 10 Version 22H2 10.0 10.0.19045.0 → < 10.0.19045.5371 10.0.19045.5371
Windows Server 2025 (Server Core installation) 10.0 10.0.26100.0 → < 10.0.26100.2894 10.0.26100.2894
Windows 11 version 22H3 10.0 10.0.22631.0 → < 10.0.22631.4751 10.0.22631.4751
Windows 11 Version 23H2 10.0 10.0.22631.0 → < 10.0.22631.4751 10.0.22631.4751
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 10.0.25398.0 → < 10.0.25398.1369 10.0.25398.1369
Windows 11 Version 24H2 10.0 10.0.26100.0 → < 10.0.26100.2894 10.0.26100.2894
Windows Server 2025 10.0 10.0.26100.0 → < 10.0.26100.2894 10.0.26100.2894

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

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