CVE-2025-27479

Kerberos Key Distribution Proxy Service Denial of Service Vulnerability

Description

Insufficient resource pool in Windows Kerberos allows an unauthorized attacker to deny service over a network.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 11.24% Top 10%
Vendor Advisory microsoft.com
Affected: Microsoft Windows Server 2019
Affected: Microsoft Windows Server 2019 (Server Core installation)
Affected: Microsoft Windows Server 2022
Affected: Microsoft Windows Server 2025 (Server Core installation)
Affected: Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
Affected: Microsoft Windows Server 2025
Affected: Microsoft Windows Server 2016
Affected: Microsoft Windows Server 2016 (Server Core installation)
Affected: Microsoft Windows Server 2012
Affected: Microsoft Windows Server 2012 (Server Core installation)
Affected: Microsoft Windows Server 2012 R2
Affected: Microsoft Windows Server 2012 R2 (Server Core installation)
Published at:
Updated at:

References

Link Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27479 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-27479?
CVE-2025-27479 has been scored as a high severity vulnerability.
How to fix CVE-2025-27479?
To fix CVE-2025-27479, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27479 being actively exploited in the wild?
It is possible that CVE-2025-27479 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~11% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27479?
CVE-2025-27479 affects Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows Server 2025, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows Server 2012, Microsoft Windows Server 2012 (Server Core installation), Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation).
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