CVE-2006-5552: Multiple heap-based buffer overflows in RevilloC MailServer 1.21 and earlier allow remote attackers to cause a

Q: How do I fix CVE-2006-5552?

revilloc mailserver: upgrade to newer than 1.21. Exact commands for each OS are on this page.

Q: Is CVE-2006-5552 being exploited?

CVE-2006-5552 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-2006-5552 affect?

CVE-2006-5552 affects revilloc mailserver. Severity is high (CVSS 7.5). Multiple heap-based buffer overflows in RevilloC MailServer 1.21 and earlier allow remote attackers to cause a denial of service (CPU consumption or application crash) or execute arbitrary code via a long argument to the (1) MAIL FROM or (2

Q: How urgent is CVE-2006-5552?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2006-5552 is a high-severity flaw (CVSS 7.5) affecting revilloc mailserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple heap-based buffer overflows in RevilloC MailServer 1.21 and earlier allow remote attackers to cause a denial of service (CPU consumption or application crash) or execute arbitrary code via a long argument to the (1) MAIL FROM or (2) RCPT TO command.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Weakness	CWE-119
Published	2006-10-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: revilloc solutions

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

Am I affected?

Timeline

2006-10-26 17:07 UTCPublished CVE record published
2026-06-16 22:31 UTCUpdated Record last modified

revilloc solutions revilloc mailserver UPGRADE

Affected: <= 1.21

Fixed in: newer than 1.21

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy revilloc-mailserver || rpm -q revilloc-mailserver || revilloc-mailserver --version

2. UPGRADE to newer than 1.21 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade revilloc-mailserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade revilloc-mailserver

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: RevilloC MailServer 1.x - 'RCPT TO' Remote Denial of Service

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-2006-5552?

revilloc mailserver: upgrade to newer than 1.21. Exact commands for each OS are on this page.

Is CVE-2006-5552 being exploited?

CVE-2006-5552 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-2006-5552 affect?

CVE-2006-5552 affects revilloc mailserver. Severity is high (CVSS 7.5). Multiple heap-based buffer overflows in RevilloC MailServer 1.21 and earlier allow remote attackers to cause a denial of service (CPU consumption or application crash) or execute arbitrary code via a long argument to the (1) MAIL FROM or (2

How urgent is CVE-2006-5552?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2006-1124 HIGH 7.5 DOWNGRADE Buffer overflow in RevilloC MailServer and Proxy 1.21 allows remote attackers to execute arbitrary code via a

References

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