An attacker with local access to machine where MicroSCADA X SYS600 is installed, could enable the session logging supporting the product and try to exploit a session hijacking of an already established session. By default, the session logging level is not enabled and only users with administrator rights can enable it.
A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).