CVE-2006-6336: Heap-based buffer overflow in the Mail Management Server (MAILMA.exe) in Eudora WorldMail 3.1.x allows remote

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HIGH 10.0DOWNGRADE

CVE-2006-6336 is a high-severity flaw (CVSS 10.0) affecting worldmail management server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the Mail Management Server (MAILMA.exe) in Eudora WorldMail 3.1.x allows remote attackers to execute arbitrary code via a crafted request containing successive delimiters.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	7.2% (top 6%)
CISA exploited list	No
Published	2006-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: eudora

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

Am I affected?

Timeline

2006-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:32 UTCUpdated Record last modified

eudora worldmail management server DOWNGRADE

Affected: 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy worldmail-management-server || rpm -q worldmail-management-server || worldmail-management-server --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison worldmail-management-server sudo apt install worldmail-management-server=<VERSION_BEFORE_3.1> sudo apt-mark hold worldmail-management-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list worldmail-management-server sudo dnf downgrade worldmail-management-server-<VERSION_BEFORE_3.1> sudo dnf versionlock add worldmail-management-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2006-6336?

worldmail management server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-6336 being exploited?

CVE-2006-6336 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-2006-6336 affect?

CVE-2006-6336 affects worldmail management server. Severity is high (CVSS 10.0). Heap-based buffer overflow in the Mail Management Server (MAILMA.exe) in Eudora WorldMail 3.1.x allows remote attackers to execute arbitrary code via a crafted request containing successive delimiters.

How urgent is CVE-2006-6336?

Priority 59/100. Critical severity; EPSS top 6%: very likely to be exploited

References

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