Is CVE-2007-4440 in the CISA KEV catalog?

No. CVE-2007-4440 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-4440?

CVE-2007-4440 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2007-4440?

CVE-2007-4440 has an EPSS score of 64.51% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2007-4440

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

Stack-based buffer overflow in the MercuryS SMTP server in Mercury Mail Transport System, possibly 4.51 and earlier, allows remote attackers to execute arbitrary code via a long AUTH CRAM-MD5 string. NOTE: this might overlap CVE-2006-5961.

CWE-119Buffer Overflow

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

64.51%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

http://archives.neohapsis.com/archives/fulldisclosure/2007-08/0341.html
http://secunia.com/advisories/26519
http://www.pmail.com/m32_451.htm
http://www.securityfocus.com/bid/25357
http://www.securitytracker.com/id?1018587
http://www.vupen.com/english/advisories/2007/2918
https://exchange.xforce.ibmcloud.com/vulnerabilities/36117
https://exchange.xforce.ibmcloud.com/vulnerabilities/36299
https://www.exploit-db.com/exploits/4294

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.