High 8.4Published Apr 29, 2026

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

Updated under an hour ago (Oct 26, 2026, 1:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Mersenne Prime95

Exploited in the last 30 days

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: 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-120
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Apr 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Mersenne Prime95 mersenne:prime95 (from the name)	29.4b8	CNA record

References

https://www.exploit-db.com/exploits/44649exploit
https://www.mersenne.org/product
https://www.mersenne.org/download/#downloadproduct
https://www.vulncheck.com/advisories/prime95-29-4b8-local-buffer-overflow-via-sehthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.