Buffer overflow in Mersenne Research, Inc Prime95
CVE-2019-25327
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Mersenne Research, Inc Prime95 — versions 29.8
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/47802 (exploit)
- www.mersenne.org (product)
- www.vulncheck.com/advisories/prime-version-build-buffer-overflow-seh (third-party-advisory)
Frequently asked questions
- What is CVE-2019-25327?
- CVE-2019-25327 is a critical-severity vulnerability in Mersenne Research, Inc Prime95, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-12.
- How severe is CVE-2019-25327?
- Critical severity. CVSS v3 base score is 9.8 out of 10.