Is CVE-2025-21350 in the CISA KEV catalog?

No. CVE-2025-21350 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21350?

CVE-2025-21350 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2025-21350?

CVE-2025-21350 has an EPSS score of 1.89% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21350?

Install KB5052040 for Windows 10. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21350

MEDIUMEPSS 77th pctl

5.9

CVSS v3

NVD

Description

Windows Kerberos Denial of Service Vulnerability

CWE-20Improper Input Validation

How to fix

Remediation Available

Windows 10Windows

Install:KB5052040Microsoft

Windows 10 Version 1607Windows

Install:KB5052006Microsoft

Windows 10 Version 1809Windows

Install:KB5052000Microsoft

Windows 10 Version 21H2Windows

Install:KB5051974Microsoft

Windows 10 Version 22H2Windows

Install:KB5051974Microsoft

Windows 11 Version 22H2Windows

Install:KB5051989Microsoft

Windows 11 Version 23H2Windows

Install:KB5051989Microsoft

Windows 11 Version 24H2Windows

Install:KB5052105

Install:KB5051987Microsoft

Windows Server 2008Windows

Install:KB5052072Microsoft

Install:KB5052038Microsoft

Windows Server 2008 R2Windows

Install:KB5052032Microsoft

Install:KB5052016Microsoft

Windows Server 2012Windows

Install:KB5052020Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5052020Microsoft

Windows Server 2012 R2Windows

Install:KB5052042Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5052042Microsoft

Windows Server 2016Windows

Install:KB5052006Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5052006Microsoft

Windows Server 2019Windows

Install:KB5052000Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5052000Microsoft

Windows Server 2022Windows

Install:KB5052106

Install:KB5051979Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5051979Microsoft

Install:KB5052106

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

Install:KB5051980Microsoft

Windows Server 2025Windows

Install:KB5051987Microsoft

Install:KB5052105

Windows Server 2025 (Server Core installation)Windows

Install:KB5052105

Install:KB5051987Microsoft

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.89%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

Embed a live status badge for CVE-2025-21350

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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 2025-02-28.