Buffer overflow in the POP 3 (POP3) service in MailEnable Standard Edition before 1.93, Professional Edition before 1.73, and Enterprise Edition before 1.21 allows remote attackers to execute arbitrary code via unknown vectors before authentication.

Stack overflow in the IMAP module (MEIMAPS.EXE) in MailEnable Professional 1.6 through 1.83 and 2.0 through 2.33, and MailEnable Enterprise 1.1 through 1.40 and 2.0 through 2.33, allows remote authenticated users to cause a denial of service (crash) via a long argument containing (asterisk) and ? (question mark) characters to the DELETE command, as addressed by the ME-10020 hotfix.

Buffer overflow in MEHTTPS (HTTPMail) of MailEnable Professional 1.5 through 1.7 allows remote attackers to cause a denial of service (application crash) via a long HTTP GET request.