CVE-2007-1373: Stack-based buffer overflow in Mercury/32 (aka Mercury Mail Transport System) 4.01b and earlier allows remote

Q: How do I fix CVE-2007-1373?

mercury mail transport system: upgrade to newer than 4.01b. Exact commands for each OS are on this page.

Q: Is CVE-2007-1373 being exploited?

CVE-2007-1373 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-1373 affect?

CVE-2007-1373 affects mercury mail transport system. Severity is high (CVSS 10.0). Stack-based buffer overflow in Mercury/32 (aka Mercury Mail Transport System) 4.01b and earlier allows remote attackers to execute arbitrary code via a long LOGIN command. NOTE: this might be the same issue as CVE-2006-5961.

Q: How urgent is CVE-2007-1373?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

This week

HIGH 10.0UPGRADE

CVE-2007-1373 is a high-severity flaw (CVSS 10.0) affecting mercury mail transport system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in Mercury/32 (aka Mercury Mail Transport System) 4.01b and earlier allows remote attackers to execute arbitrary code via a long LOGIN command. NOTE: this might be the same issue as CVE-2006-5961.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	60.2% (top 1%)
CISA exploited list	No
Published	2007-03-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: pmail

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-03-10 00:19 UTCPublished CVE record published
2026-06-16 22:37 UTCUpdated Record last modified

pmail mercury mail transport system UPGRADE

Affected: <= 4.01b

Fixed in: newer than 4.01b

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mercury-mail-transport-system || rpm -q mercury-mail-transport-system || mercury-mail-transport-system --version

2. UPGRADE to newer than 4.01b (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mercury-mail-transport-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mercury-mail-transport-system

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Mercury/32 Mail Server 4.01b - 'check' Buffer Overflow (PoC)
Exploit-DB: Mercury/32 Mail Server 4.01a (Pegasus) - IMAP Buffer Overflow
Exploit-DB: Mercury/32 Mail Server < 4.01b - LOGIN Buffer Overflow (Metasploit)
Metasploit: Mercury/32 4.01 IMAP LOGIN SEH Buffer Overflow

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2007-1373?

mercury mail transport system: upgrade to newer than 4.01b. Exact commands for each OS are on this page.

Is CVE-2007-1373 being exploited?

CVE-2007-1373 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2007-1373 affect?

CVE-2007-1373 affects mercury mail transport system. Severity is high (CVSS 10.0). Stack-based buffer overflow in Mercury/32 (aka Mercury Mail Transport System) 4.01b and earlier allows remote attackers to execute arbitrary code via a long LOGIN command. NOTE: this might be the same issue as CVE-2006-5961.

How urgent is CVE-2007-1373?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2007-4440 HIGH 7.5 UPGRADE Stack-based buffer overflow in the MercuryS SMTP server in Mercury Mail Transport System, possibly 4.51 and ea
CVE-2006-5961 HIGH 7.5 DOWNGRADE Buffer overflow in Mercury Mail Transport System 4.01b for Windows has unknown impact and attack vectors, as o
CVE-2005-4411 HIGH 7.5 DOWNGRADE Buffer overflow in Mercury Mail Transport System 4.01b allows remote attackers to execute arbitrary code via a

References

← Back to latest CVEs