This indicates an attempt to exploit a buffer-overflow vulnerability in IBM Lotus Domino Web Access.
This vulnerability is caused by improper handling of long strings passed to the "General_ServerName" property in dwa7W.dll. A remote attacker can exploit this to execute arbitrary code.
IBM Lotus Domino Web Access dwa7W.dll 18.104.22.168
System Compromise: remote attackers can gain control of vulnerable systems.
We are not aware of any patch that is available at this time.
Set the kill bit for the affected ActiveX control.