Mailmax Version 5 has a buffer overflow condition in its IMAP4 server that can cause the service to stop responding and allows a remote attacker to overwrite the exception handler on the stack. Doing this could allow arbitrary code execution as the SYSTEM user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31138/0x36.smartmax
Source: https://packetstormsecurity.com/files/31138/0x36.smartmax.html