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CVE-2025-29955: Windows Hyper-V Denial of Service Vulnerability

6.2 CVSS

Description

Improper input validation in Windows Hyper-V allows an unauthorized attacker to deny service locally.

Classification

CVE ID: CVE-2025-29955

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.2

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types

CWE-20: Improper Input Validation

Affected Products

Vendor: Microsoft

Product: Windows Server 2025 (Server Core installation), Windows Server 2022, 23H2 Edition (Server Core installation), Windows 11 Version 24H2, Windows Server 2025

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.09% (probability of being exploited)

EPSS Percentile: 25.84% (scored less or equal to compared to others)

EPSS Date: 2025-06-11 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-29955
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29955

Timeline