CVE-2025-53809

Improper input validation in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
microsoftCNA
6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 42%
VendorProductVersion
microsoftwindows_11_24h2
𝑥
< 10.0.26100.6508
microsoftwindows_server_2025
𝑥
< 10.0.26100.6508
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53809