TECH: Wireless mice leave billions at risk of computer hack, by Ben Gruber. Many wireless mice use unencrypted signals to communicate with computers. An attacker can send signals to your computer from up to 180 meters away, using a simple line of code to trick the wireless chip connected to the target computer into accepting the attacker as a mouse. They then pretend to be a keyboard, and it is as if the attacker was sitting at your computer typing on the computer.
At a thousand words a minute, the hacker can take over the computer or gain access to a network within seconds.
Bluetooth devices are not vulnerable to this type of attack.