MailEnable Professional before 1.78 provides a cleartext user password when an administrator edits the user's settings, which allows remote authenticated administrators to obtain sensitive information by viewing the HTML source.

The SMTP service of MailEnable Standard 1.92 and earlier, Professional 2.0 and earlier, and Enterprise 2.0 and earlier before the MESMTPC hotfix, allows remote attackers to cause a denial of service (application crash) via a HELO command with a null byte in the argument, possibly triggering a length inconsistency or a missing argument.

Unspecified vulnerability in the POP service in MailEnable Standard Edition before 1.94, Professional Edition before 1.74, and Enterprise Edition before 1.22 has unknown attack vectors and impact related to "authentication exploits". NOTE: this is a different set of affected versions, and probably a different vulnerability than CVE-2006-1337.

Webmail in MailEnable Professional Edition before 1.73 and Enterprise Edition before 1.21 allows remote attackers to cause a denial of service (CPU consumption) via unspecified vectors involving "incorrectly encoded quoted-printable emails".

IMAP service in MailEnable Professional Edition before 1.72 allows remote attackers to cause a denial of service (service crash) via unspecified vectors involving the EXAMINE command.

Multiple buffer overflows in MailEnable Professional 1.71 and Enterprise 1.1 before patch ME-10009 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via long (1) LIST, (2) LSUB, and (3) UID FETCH commands. NOTE: it is possible that these are alternate vectors for the issue described in CVE-2005-4402.

Unknown vulnerability in the SMTP service in MailEnable Standard before 1.9 and Professional before 1.6 allows remote attackers to cause a denial of service (crash) during authentication.