CVE-2006-0853: Buffer overflow in the IMAP service of TrueNorth Internet Anywhere (IA) eMailserver 5.3.4 allows remote authen

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MEDIUM 6.5DOWNGRADE

CVE-2006-0853 is a medium-severity flaw (CVSS 6.5) affecting ia emailserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the IMAP service of TrueNorth Internet Anywhere (IA) eMailserver 5.3.4 allows remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a long SEARCH argument.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Published	2006-02-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: truenorth software

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

Am I affected?

Timeline

2006-02-23 02:06 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

truenorth software ia emailserver DOWNGRADE

Affected: corporate_5.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before corporate_5.3.4

1. Check installed version

apt-cache policy ia-emailserver || rpm -q ia-emailserver || ia-emailserver --version

2. No fixed release: DOWNGRADE to a release before corporate_5.3.4 (Debian / Ubuntu)

apt-cache madison ia-emailserver sudo apt install ia-emailserver=<VERSION_BEFORE_corporate_5.3.4> sudo apt-mark hold ia-emailserver

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

dnf --showduplicates list ia-emailserver sudo dnf downgrade ia-emailserver-<VERSION_BEFORE_corporate_5.3.4> sudo dnf versionlock add ia-emailserver

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-2006-0853?

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

Is CVE-2006-0853 being exploited?

CVE-2006-0853 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-2006-0853 affect?

CVE-2006-0853 affects ia emailserver. Severity is medium (CVSS 6.5). Buffer overflow in the IMAP service of TrueNorth Internet Anywhere (IA) eMailserver 5.3.4 allows remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a long SEARCH argument.

How urgent is CVE-2006-0853?

Priority 44/100. No elevated risk signals yet.

Related CVEs

CVE-2005-2083 MEDIUM 5.0 DOWNGRADE Format string vulnerability in IMAP4 in IA eMailServer Corporate Edition 5.2.2 build 1051 allows remote attack

References

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