CVE-2025-27479 Kerberos Key Distribution Proxy Service Denial of Service Vulnerability
An unauthorized attacker can cause a denial of service in the Windows Kerberos Key Distribution Proxy Service due to insufficient resource pooling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27479?
CVE-2025-27479 is a high-severity denial of service vulnerability in Microsoft Windows Server 2012, published on 8 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Insufficient resource pool in Windows Kerberos allows an unauthorized attacker to deny service over a network.
Weakness: CWE-410
Which versions are affected by CVE-2025-27479?
It affects 6 products.
Products include Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-27479?
No fix has been published for CVE-2025-27479 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-27479 being exploited?
There is no known exploitation of CVE-2025-27479 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2012
- CVE-2025-59287 Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data
- CVE-2026-69595 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-78445 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability
- CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability
Sources
Also known as GHSA-5v5h-mr5g-h898.