So many of you guys probably know that SCADA systems can be found in the internet. It is not so hard. You just need to know google or shodanhq search strings.
But what is more important is that PLC devices that must be much more secured from the outside than SCADA are also available from the internet!
Let me show you one example of one of the most popular PLC device from WAGO. It can be easily founded using the inurl:/plc/webvisu.htm
Just a little add-on. You can also use ShodanHq with search string "/plc/webvisu.htm" and fing 90 more systems.
And you can find real examples of remotely operated PLC devices like a smart house for example. And of cause there are some default passwords like admin:wago