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CVE-2006-0447: Multiple buffer overflows in E-Post Mail Server 4.10 and SPA-PRO Mail @Solomon 4.00 allow remote attackers to

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This month
HIGH 7.5DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2006-0447 is a high-severity flaw (CVSS 7.5) affecting mail server, smtp server, spa-pro mail atsolomon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple buffer overflows in E-Post Mail Server 4.10 and SPA-PRO Mail @Solomon 4.00 allow remote attackers to execute arbitrary code via a long username to the (1) AUTH PLAIN or (2) AUTH LOGIN SMTP commands, which is not properly handled by (a) EPSTRS.EXE or (b) SPA-RS.EXE; (3) a long username in the APOP POP3 command, which is not properly handled by (c) EPSTPOP4S.EXE or (d) SPA-POP3S.EXE; (4) a long IMAP DELETE command, which is not properly ha

Why this priority

  • High severity
  • EPSS top 8%: very likely to be exploited

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

Risk facts

CVSS score7.5 (High)
EPSS exploit chance4.6% (top 8%)
CISA exploited listNo
Published2006-01-27
Last modified2026-06-16
Publisher (CNA): MITRE · Vendor: e-post corporation

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

Am I affected?

Timeline

e-post corporation mail server DOWNGRADE
Affected: 4.10 · enterprise_4.10
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.10
1. Check installed version
apt-cache policy mail-server || rpm -q mail-server || mail-server --version
2. No fixed release: DOWNGRADE to a release before 4.10 (Debian / Ubuntu)
apt-cache madison mail-server sudo apt install mail-server=<VERSION_BEFORE_4.10> sudo apt-mark hold mail-server
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list mail-server sudo dnf downgrade mail-server-<VERSION_BEFORE_4.10> sudo dnf versionlock add mail-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.
e-post corporation smtp server DOWNGRADE
Affected: 4.10 · enterprise_4.10
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.10
1. Check installed version
apt-cache policy smtp-server || rpm -q smtp-server || smtp-server --version
2. No fixed release: DOWNGRADE to a release before 4.10 (Debian / Ubuntu)
apt-cache madison smtp-server sudo apt install smtp-server=<VERSION_BEFORE_4.10> sudo apt-mark hold smtp-server
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list smtp-server sudo dnf downgrade smtp-server-<VERSION_BEFORE_4.10> sudo dnf versionlock add smtp-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.
e-post corporation spa-pro mail atsolomon DOWNGRADE
Affected: 4.00 · enterprise_4.00
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.00
1. Check installed version
apt-cache policy spa-pro-mail-atsolomon || rpm -q spa-pro-mail-atsolomon || spa-pro-mail-atsolomon --version
2. No fixed release: DOWNGRADE to a release before 4.00 (Debian / Ubuntu)
apt-cache madison spa-pro-mail-atsolomon sudo apt install spa-pro-mail-atsolomon=<VERSION_BEFORE_4.00> sudo apt-mark hold spa-pro-mail-atsolomon
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list spa-pro-mail-atsolomon sudo dnf downgrade spa-pro-mail-atsolomon-<VERSION_BEFORE_4.00> sudo dnf versionlock add spa-pro-mail-atsolomon
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-2006-0447?

mail server: downgrade or apply the listed mitigation; smtp server: downgrade or apply the listed mitigation; spa-pro mail atsolomon: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-0447 being exploited?

CVE-2006-0447 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-2006-0447 affect?

CVE-2006-0447 affects mail server, smtp server, spa-pro mail atsolomon. Severity is high (CVSS 7.5). Multiple buffer overflows in E-Post Mail Server 4.10 and SPA-PRO Mail @Solomon 4.00 allow remote attackers to execute arbitrary code via a long username to the (1) AUTH PLAIN or (2) AUTH LOGIN SMTP commands, which is not properly handled by

How urgent is CVE-2006-0447?

Priority 49/100. High severity; EPSS top 8%: very likely to be exploited

Related CVEs

References

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