Service Denial Vulnerability in Windows Kerberos by Microsoft
CVE-2025-27479

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Windows Server 2025 (server Core Installation)
Vendor
CVE Published:
8 April 2025

What is CVE-2025-27479?

The Windows Kerberos service has a vulnerability due to insufficient resource management, which enables unauthorized attackers to execute denial of service attacks over a network. This can disrupt and impair critical services relying on Kerberos authentication, leading to potential system unavailability.

Affected Version(s)

Windows Server 2012 (Server Core installation) x64-based Systems 6.2.9200.0 < 6.2.9200.25423

Windows Server 2012 R2 (Server Core installation) x64-based Systems 6.3.9600.0 < 6.3.9600.22523

Windows Server 2012 R2 x64-based Systems 6.3.9600.0 < 6.3.9600.22523

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

EPSS Score

24% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-27479 : Service Denial Vulnerability in Windows Kerberos by Microsoft