Ok… cracking is bad… but enabling telnet is worse!
“Cisco is warning of a new critical zero-day IOS / IOS XE vulnerability that affects more than 300 of its switch models. The company identified this highest level of vulnerability in its product while analyzing “Vault 7” — a roughly 8,761 documents and files leaked by Wikileaks last week, claiming to detail hacking tools and tactics of the Central Intelligence Agency (CIA).”
More here: http://thehackernews.com/2017/03/cisco-network-switch-exploit.html