CVE-2019-25327 Prime95 Version 29.8 build 6 - Buffer Overflow (SEH)
Remote attackers can execute arbitrary code by pasting malicious payloads into Prime95 user ID or proxy fields, triggering a bind shell.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-25327?
CVE-2019-25327 is a high-severity memory corruption vulnerability in Mersenne Research, Inc Prime95, published on 12 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Prime95 version 29.8 build 6 contains a buffer overflow vulnerability in the user ID input field that allows remote attackers to execute arbitrary code. Attackers can craft a malicious payload and paste it into the PrimeNet user ID and proxy host fields to trigger a bind shell on port 3110.
Weakness: CWE-122
Which versions are affected by CVE-2019-25327?
How do I fix CVE-2019-25327?
No fix has been published for CVE-2019-25327 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-2019-25327 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25327 exists.
Sources
Also known as GHSA-x252-4r5q-2hc6.