What’s Vulnerable › Vulnerabilities

CVE-2018-25299: Prime95 29.4b8 Local Buffer Overflow via SEH

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-29 · updated 2026-06-17
• Weakness: CWE-120

Description

Prime95 29.4b8 contains a local buffer overflow vulnerability that allows attackers to execute arbitrary code by exploiting structured exception handling (SEH) mechanisms. Attackers can inject malicious payload through the optional proxy hostname field in the PrimeNet connection settings to trigger the overflow and execute system commands.

Affected products

• Mersenne Prime95: 29.4b8

References

• https://www.exploit-db.com/exploits/44649
• https://www.mersenne.org/
• https://www.mersenne.org/download/#download
• https://www.vulncheck.com/advisories/prime95-29-4b8-local-buffer-overflow-via-seh

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