CMailServer ActiveX Control Multiple Buffer Overflow Vulnerabilities

This host is installed with CMailServer ActiveX Control and is prone to Multiple Buffer Overflow vulnerabilities.
This issue can be exploited by sending a specially crafted POST request to mvmail.asp with an overly long 'indexOfMail' parameter to execute arbitrary code on the affected system.
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one. A workaround is to set the Killbit for the vulnerable CLSID
A boundary error occurs in CMailServer POP3 Class ActiveX control (CMailCOM.dll) while handling arguments passed to the 'MoveToFolder()' method.
CMailServer version 5.4.6 and prior.