CVE-2018-25299 Prime95 29.4b8 Local Buffer Overflow via SEH
Local attackers can execute arbitrary code via buffer overflow in Prime95's proxy settings, requiring specific configuration to exploit.
- 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-2018-25299?
CVE-2018-25299 is a high-severity memory corruption vulnerability in Mersenne Prime95, published on 29 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Prime95 29.4b8 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code by exploiting structured exception handling (SEH) mechanisms. Attackers can inject malicious payload through the optional proxy hostname field in the PrimeNet connection settings to trigger the overflow and execute system commands.
Weakness: CWE-120
Which versions are affected by CVE-2018-25299?
How do I fix CVE-2018-25299?
No fix has been published for CVE-2018-25299 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-2018-25299 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25299 exists.
Sources
Also known as GHSA-vp92-854v-9rq4.