Stack-based buffer overflow in the IMAP service in MailEnable Enterprise and Professional Editions 2.37 and earlier allows remote authenticated users to execute arbitrary code via a long argument to the APPEND command. NOTE: this is probably different than CVE-2006-6423.
https://www.exploit-db.com/exploits/3397
https://exchange.xforce.ibmcloud.com/vulnerabilities/32801
http://www.vupen.com/english/advisories/2007/0811
http://www.securitytracker.com/id?1017739