The remote host is vulnerable to a buffer overflow.
The remote host is running Macallan Mail Solution, a mail server (POP,SMTP,HTTP) for Windows. It is reported that Macallan Mail Solution is prone to a HTTP GET buffer overflow vulnerability and to an authentication bypass vulnerability. An attacker exploiting those flaws may be able to access an administrative interface, crash the service or execute arbitrary code.
Upgrade to version 188.8.131.52 or higher.