Video: Hacking Cisco Phones

Hackers demonstrated how to transform a Cisco phone (with vulnerabilities firmwares) into a audio recording station for spying without loosing phone's original capabilities.

Amazing!

My small advice:

1. Make sure all your Cisco phones are from the official Cisco sources.
2. Update phone firmware regularly.
3. Protect your Voice VLAN as much as possible.

By the way, I did not notice Cisco phones are so popular before watching this video. Now I know Cisco phones are used in Oval Office, Air Force One (plane), and also CIA offices of United States (see 5:29 of this video).