Is CVE-2025-21193 in the CISA KEV catalog?

No. CVE-2025-21193 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21193?

CVE-2025-21193 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2025-21193?

CVE-2025-21193 has an EPSS score of 0.72% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21193?

Install KB5049993 for Windows Server 2016. Fixes are available for 9 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21193

MEDIUM

6.5

CVSS v3

NVD

Description

Active Directory Federation Server Spoofing Vulnerability

CWE-352Cross-Site Request Forgery

How to fix

Remediation Available

Windows Server 2016Windows

Install:KB5049993Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5049993Microsoft

Windows Server 2019Windows

Install:KB5050008Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5050008Microsoft

Windows Server 2022Windows

Install:KB5049983Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5049983Microsoft

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5049984Microsoft

Windows Server 2025Windows

Install:KB5050009Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5050009Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.72%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-352 (Cross-Site Request Forgery) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-6277	High	8.8	100%	KEV	-
CVE-2014-0054	Medium	6.8	91%	-	Fix
CVE-2013-6429	Medium	6.8	90%	-	Fix
CVE-2022-41622	High	8.8	88%	-	-
CVE-2018-7700	High	8.8	75%	-	-
CVE-2015-2295	Medium	6.8	66%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-01-27.