Just when you had got to grips with the Windows ransomware vulnerability WannaCry, comes another big one, dubbed SambaCry, a serious vulnerability in the open source Samba package which implements SMB/CIFS protocols. Headlines:
I would not expect any Internet-exposed machines to have this open, but Shodan indicates there many thousands that are. So while you may not be exposing it directly, it may just be a matter of time before this exploit is weaponised to exploit indirect channels to get inside Intranets and propagate.
Note that from a Discovery appliance perspective, we don't run a Samba server, so the appliance stack is not vulnerable.