OnlyFm252
Active Directory Federation Services

CVE-2025-59258 — Windows Active Directory Federation Services (ADFS) Information Disclosure Vulnerability

Important CVSS 6.2 EPSS 0.00538 2025-10 archive

Executive Summary

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

Overview

6.2
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Information Disclosure
Released Oct 14 2025
Last Updated Oct 14 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00538 — 0.40972 percentile
NVD CVSS 6.2 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 5.4

EPSS Score

0.00538
probability of exploitation in the next 30 days
0.40972 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

13 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2012 5066875 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2012 (Server Core installation) 5066875 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2012 R2 5066873 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2012 R2 (Server Core installation) 5066873 (Monthly Rollup) Important Information Disclosure Yes
Windows Server 2016 5066836 (Security Update) Important Information Disclosure Yes
Windows Server 2016 (Server Core installation) 5066836 (Security Update) Important Information Disclosure Yes
Windows Server 2019 5066586 (Security Update) Important Information Disclosure Yes
Windows Server 2019 (Server Core installation) 5066586 (Security Update) Important Information Disclosure Yes
Windows Server 2022 5066782 (Security Update) Important Information Disclosure Yes
Windows Server 2022 (Server Core installation) 5066782 (Security Update) Important Information Disclosure Yes
Windows Server 2022, 23H2 Edition (Server Core installation) 5066780 (Security Update) Important Information Disclosure Yes
Windows Server 2025 5066835 (Security Update) Important Information Disclosure Yes
Windows Server 2025 (Server Core installation) 5066835 (Security Update) Important Information Disclosure Yes

Patches

7 patches
Article Type Restart
5066875 Monthly Rollup Yes
5066873 Monthly Rollup Yes
5066836 Security Update Yes
5066586 Security Update Yes
5066782 Security Update Yes
5066780 Security Update Yes
5066835 Security Update Yes

Known Exploits

Acknowledgments

Anonymous

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