CVE-2025-21193

Name: CVE-2025-21193
Creator: NVD / NIST
Published: 2025-01-14T18:15:31.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2025-21193 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Active Directory Federation Server Spoofing Vulnerability. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

Active Directory Federation Server Spoofing Vulnerability

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS Probability

0.72%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Microsoft	Windows Server 2016	< 10.0.14393.7699
Microsoft	Windows Server 2019	< 10.0.17763.6775
Microsoft	Windows Server 2022	< 10.0.20348.3091
Microsoft	Windows Server 2022 23h2	< 10.0.25398.1369
Microsoft	Windows Server 2025	< 10.0.26100.2894

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21193Patch, Vendor Advisory

Timeline

Published: Jan 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-21193?

Active Directory Federation Server Spoofing Vulnerability

How severe is CVE-2025-21193?

CVE-2025-21193 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2025-21193?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-21193?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST