The company did not elaborate on the theft, but computer security experts said the source code, posted last year on the internet, had been used for a series of attacks on computer systems, including those of the US military and research institutions.Forbes
Swedish teen arrested for Cisco code theft

Cisco announced that a 16-year old Swedish teen has been arrested for hacking Cisco and stealing its source code. This included programming instructions for equipment controlling a large share of world's internet traffic.