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.

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 pro…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (36.1th percentile) — read the EPSS interpretation.

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.

Affected products

Mersenne Research, Inc Prime95 — versions 29.8

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (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.