CVE-2018-25293: Prime95 29.4b7 Denial of Service via Proxy Password Field

Severity: medium (CVSS 6.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-26 · updated 2026-06-17
Weakness: CWE-120

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.

Affected products

Mersenne Prime95: 29.4b7

References

http://www.mersenne.org
http://www.mersenne.org/ftp_root/gimps/p95v294b7.win32.zip
https://www.exploit-db.com/exploits/45226
https://www.vulncheck.com/advisories/prime95-29-4b7-denial-of-service-via-proxy-password-field

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