CVE-2025-53809CWE-20

CVE-2025-53809

Medium · published September 9, 2025

CVSS v3.1
6.5
EPSS
2%
Percentile
75.2
In the wild
Unconfirmed
What it is

Improper input validation in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01573 · 75.2th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2025-09-09T21:15Z
Affected products (2)
ProductVersionsFixed in
microsoft/windows_11_24h2< 10.0.26100.650810.0.26100.6508
microsoft/windows_server_2025< 10.0.26100.650810.0.26100.6508
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53809 · [email protected]
EPSS history
Timeline
  • 09 SEP 17:01Z
    Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
    cvelistv5