CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability
An unauthorized attacker can execute arbitrary code remotely via a stack-based buffer overflow in the Windows Netlogon 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-2026-41089?
CVE-2026-41089 is a critical memory corruption vulnerability in Microsoft Windows Server 2012, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.
Weakness: CWE-121
Which versions are affected by CVE-2026-41089?
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-2026-41089?
No fix has been published for CVE-2026-41089 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-41089 being exploited?
There is no known exploitation of CVE-2026-41089 in the wild and no public exploit code.
Public exploit code: 7 proofs of concept on GitHub.
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-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability
- CVE-2023-24941 Windows Network File System Remote Code Execution Vulnerability
Sources
Also known as GHSA-7j2c-v44v-wc8f.