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

PUBLISHEDvulnerability record
2025-01-14 Β· last modified June 21, 2025

Metadata

CVE ID:
CVE-2025-21333
Project:
Microsoft
Product:
Windows
Date Added:
2025-01-14
Due Date:
2025-02-04
Last Updated:
June 21, 2025

Vulnerability Name

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

Description

Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Additional Notes

  • https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21333
  • https://nvd.nist.gov/vuln/detail/CVE-2025-21333

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