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

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HIGH 7.5DOWNGRADE

CVE-2006-1124 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.

Buffer overflow in RevilloC MailServer and Proxy 1.21 allows remote attackers to execute arbitrary code via a long USER command.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	7.3% (top 6%)
CISA exploited list	No
Published	2006-03-09
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

2006-03-09 21:02 UTCPublished CVE record published
2026-06-16 22:22 UTCUpdated Record last modified

revilloc solutions revilloc mailserver DOWNGRADE

Affected: 1.21 · proxy_1.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.21

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.21 (Debian / Ubuntu)

apt-cache madison revilloc-mailserver sudo apt install revilloc-mailserver=<VERSION_BEFORE_1.21> sudo apt-mark hold revilloc-mailserver

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

dnf --showduplicates list revilloc-mailserver sudo dnf downgrade revilloc-mailserver-<VERSION_BEFORE_1.21> sudo dnf versionlock add revilloc-mailserver

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.

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 1.21 - 'USER' Remote 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-2006-1124?

revilloc mailserver: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-1124 being exploited?

CVE-2006-1124 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-2006-1124 affect?

CVE-2006-1124 affects revilloc mailserver. Severity is high (CVSS 7.5). Buffer overflow in RevilloC MailServer and Proxy 1.21 allows remote attackers to execute arbitrary code via a long USER command.

How urgent is CVE-2006-1124?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2006-5552 HIGH 7.5 UPGRADE Multiple heap-based buffer overflows in RevilloC MailServer 1.21 and earlier allow remote attackers to cause a

References

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