CVE-2025-21333

CISA KEV
ACT NOW Priority: 0.00 BB Relevance: 2/100
Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

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.

CISA Known Exploited Vulnerability

Vendor / Product Microsoft — Windows
Date Added 2025-01-14
Remediation Due 2025-02-04
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21333 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21333

Bug Bounty Relevance

2 / 100
✓ Known exploited (KEV)

CVSS Score

Unscored

EPSS — Exploitation Probability

10.07%
Raw Score 0.100660
Percentile 95.6%
Date 2026-10-28

Intelligence Sources

kev ref →