CVE-2025-21334HIGH 7.8CISA KEVEPSS p71.5%

CVE-2025-21334Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability

Microsoft / Windows

Description

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

Scoring

CVSS 3.17.8 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS1.53% probability of exploitation · percentile 71.5% · 2026-06-18T12:00:27Z
Published2025-01-14
Last modified2025-10-27

CISA KEV entry

Added to KEV: 2025-01-14

Underlying weaknesses· 1

CWE-416

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21334
  2. https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21334

1

TypeTargetConfidenceTier
WeaknessUse After Freecwe-4160%live

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerabilitykev-cve-2025-213340%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability
CVE
CVE-2026-40402
CVE
Microsoft Windows Win32k Use-After-Free Vulnerability
CVE
Microsoft Windows Hyper-V Privilege Escalation Vulnerability
CVE
CVE-2026-45653
CVE
CVE-2026-42984
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.