What is CVE-2022-30055?

CVE-2022-30055 is a critical-severity vulnerability in Mersenne Prime95, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-05-16.

How severe is CVE-2022-30055?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Mersenne Prime95

CVE-2022-30055

Prime95 30.7 build 9 suffers from a Buffer Overflow vulnerability that could lead to Remote Code Execution.

Vulnerability class: Buffer Overflow

Published 2022-05-16 · last modified 2026-06-17.

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: 0.039 (89.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000

Affected products

Mersenne Prime95 — versions 30.7
Microsoft Windows

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

packetstormsecurity.com/files/166840/Prime95-30.7-Build-9-Buffer-Overflow.html (Exploit, VDB Entry, Third Party Advisory)
mrvar0x.com/2022/04/25/prime95-buffer-overflow-rce/ (Technical Description, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-30055?: CVE-2022-30055 is a critical-severity vulnerability in Mersenne Prime95, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2022-05-16.
How severe is CVE-2022-30055?: Critical severity. CVSS v3 base score is 9.8 out of 10.