CVE-2025-59258

Windows Active Directory Federation Services (ADFS) Information Disclosure Vulnerability

CVE-2025-59258 is fixed in 13 products on 1 platform, first by KB5066836, released October 14, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

6.2

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0060

48th percentile

<p>Insertion of sensitive information into log file in Active Directory Federation Services allows an unauthorized attacker to disclose information locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2012		KB5066875	Oct 14, 2025
Windows Server 2012 (Server Core installation)		KB5066875	Oct 14, 2025
Windows Server 2012 R2		KB5066873	Oct 14, 2025
Windows Server 2012 R2 (Server Core installation)		KB5066873	Oct 14, 2025
Windows Server 2016	14393.8519	KB5066836	Oct 14, 2025
Windows Server 2016 (Server Core installation)	14393.8519	KB5066836	Oct 14, 2025
Windows Server 2019	17763.7919	KB5066586	Oct 14, 2025
Windows Server 2019 (Server Core installation)	17763.7919	KB5066586	Oct 14, 2025
Windows Server 2022	20348.4294	KB5066782	Oct 14, 2025
Windows Server 2022 (Server Core installation)	20348.4294	KB5066782	Oct 14, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1913	KB5066780	Oct 14, 2025
Windows Server 2025		KB5066835	Oct 14, 2025
Windows Server 2025 (Server Core installation)		KB5066835	Oct 14, 2025

Details

Published
October 14, 2025
Weakness
Insertion of Sensitive Information into Log File
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59258

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