CVE-2018-25299

Prime95 29.4b8 Local Buffer Overflow via SEH

CVSS 8.6 HIGHEPSS 0.2%CWE-120

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.6EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

29 Apr 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Mersenne · Prime95

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/44649unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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