CVE-2018-25293 Prime95 29.4b7 Denial of Service via Proxy Password Field
Local attackers can crash Prime95 by entering an excessively long string in the proxy password field, causing a buffer overflow.
- 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-2018-25293?
CVE-2018-25293 is a medium-severity memory corruption vulnerability in Mersenne Prime95, published on 26 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Prime95 29.4b7 contains a buffer overflow vulnerability in the PrimeNet connection dialog that allows local attackers to crash the application by supplying an excessively long string in the optional proxy password field. Attackers can trigger a denial of service by entering a 6000-byte payload into the proxy password parameter, causing the application to crash when processing the connection settings.
Weakness: CWE-120
Which versions are affected by CVE-2018-25293?
How do I fix CVE-2018-25293?
No fix has been published for CVE-2018-25293 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-2018-25293 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25293 exists.
Sources
Also known as GHSA-h6jp-6wrq-7m6h.