Lego Mindstorms robots might have a problem if you have their EV3 control computer connected to a network. Original message is from Heise (in German, Google-translated version is here). Seems like Bashlite is attacking these, building some botnet with them.
So should you have Lego robots with that EV3 computer, it might be a good idea to scan your own network, and/or to block port 23 (telnet). Should your school have these, inform the teachers as well.