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CVE-2025-21335: Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability
Microsoft Windows · in CISA KEV since 2025-01-14
2025-01-14added to KEV
2025-02-04federal remediation due date
1.39%EPSS exploit probability (30 days) 71.2th percentile
7.8 HIGHCVSS 3.1
Unknownknown ransomware use
0days from NVD publication to KEV
What it is
Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.
Required action (CISA)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-416 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2025-01-14 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-21335.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.