Risk Letters

Exploited vulnerability

CVE-2025-21335

TLP:CLEAR

Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability

Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

Facts

  • Vendor: Microsoft
  • Product: Windows
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 1.4 %
  • On CISA's Known Exploited Vulnerabilities list since: 14 January 2025
  • First known exploitation: 14 January 2025
  • CISA's deadline for US federal agencies: 4 February 2025
  • Weakness: CWE-416
  • First seen by Risk Letters: 14 January 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD