Snom phone security announcement
If you use snom phones it’s worth having a read though this security announcement dated 13/1/15 –
http://www.securityfocus.com/archive/1/534462/30/0/threaded
If your phones are in an untrusted public environment or accessible over the internet (it looks like it’s mainly the web interface that has issues) then it’s going to be absolutely critical that you update the firmware.