I'm sure everyone here has a super duper uber secure network and never
has to worry about something like this:
http://seclist.us/chimayred-reverse-engineering-of-mikrotik-exploits-from-vault-7-cia-leaks.html
That info is from January. If you have a MIPS BE or x86 mikrotik on ROS
6.38.4 or lower and have the http service exposed to the world then you
could be hit by this. The remotely executable code could be anything,
even a remote shell which the attacker can use for any kind of
additional ongoing nonsense. Their CPU usage will show up as
"unclassified" in Tool -> Profile. I plead the 5th on how I know that
last part.
Also on March 12 they announced a remote exploit in the SMB service. I
don't imagine most of us use the SMB service though.