Improper input validation in Microsoft Windows_11_24h2
CVE-2025-29955
Improper input validation in Windows Hyper-V allows an unauthorized attacker to deny service locally.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.005 (36.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Microsoft Windows_11_24h2
- Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
- Microsoft Windows_server_2022_23h2
- Microsoft Windows Server 2022, 23h2 Edition (Server Core Installation) — versions 10.0.25398.0
- Microsoft Windows Server 2025 — versions 10.0.26100.0
- Microsoft Windows_server_2025
- Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-29955?
- CVE-2025-29955 is a medium-severity vulnerability in Microsoft Windows_11_24h2, classified under Improper Input Validation. CVSS score: 6.2/10. Published 2025-05-13.
- How severe is CVE-2025-29955?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2025-29955 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.