Multiple unspecified vulnerabilities in MailEnable Professional 1.6 and earlier and Enterprise 1.1 and earlier allow attackers to cause a denial of service (crash) via invalid IMAP commands.

Directory traversal vulnerability in the IMAP service (meimaps.exe) of MailEnable Professional 1.6 and earlier and Enterprise 1.1 and earlier allows remote attackers to create or rename arbitrary mail directories via the mailbox name argument of the (1) create or (2) rename commands.

Buffer overflow in the IMAP service for MailEnable Enterprise 1.04 and earlier and Professional 1.54 allows remote attackers to execute arbitrary code via a long AUTHENTICATE command.

The SMTP service in MailEnable Enterprise 1.04 and earlier and Professional 1.54 and earlier allows remote attackers to cause a denial of service (server crash) via an EHLO command with a Unicode string.

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.

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".

Unspecified vulnerability in MailEnable Enterprise Edition before 1.2 allows remote attackers to cause a denial of service (CPU utilization) by viewing "formatted quoted-printable emails" via webmail.