CVE-2018-25251 Snes9K 0.0.9z Buffer Overflow SEH via Netplay Socket
Local attackers can achieve code execution by exploiting a buffer overflow in the Netplay Socket Port Number field of the Snes9K emulator.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-25251?
CVE-2018-25251 is a high-severity memory corruption vulnerability in Sourceforge Snes9K 0.0.9z, published on 4 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Snes9K 0.0.9z contains a buffer overflow vulnerability in the Netplay Socket Port Number field that allows local attackers to trigger a structured exception handler (SEH) overwrite. Attackers can craft a malicious payload and paste it into the Socket Port Number field via the Netplay Options menu to achieve code execution through SEH chain exploitation.
Weakness: CWE-787
Which versions are affected by CVE-2018-25251?
How do I fix CVE-2018-25251?
No fix has been published for CVE-2018-25251 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-2018-25251 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25251 exists.
Sources
Also known as GHSA-6pmp-6mx7-3x6f.