CVE-2025-49735 Windows KDC Proxy Service (KPSSVC) Remote Code Execution Vulnerability
An unauthorized attacker can execute code over the network via a use-after-free flaw in the Windows KDC Proxy Service.
- 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-2025-49735?
CVE-2025-49735 is a high-severity use after free vulnerability in Microsoft Windows Server 2012, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use after free in Windows KDC Proxy Service (KPSSVC) allows an unauthorized attacker to execute code over a network.
Weakness: CWE-416
Which versions are affected by CVE-2025-49735?
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-2025-49735?
No fix has been published for CVE-2025-49735 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-49735 being exploited?
There is no known exploitation of CVE-2025-49735 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-hq3j-8wc4-4985.