Kindle Touch Security Vulnerability
Kindle Touch firmware version 5.1.0 added a new plugin framework for the built in web browser, and through this a maliciously coded website could effectively gain control of the Kindle Touch to access files and data as well as the 3G and Wi-Fi connection.
Amazon are apparently aware of this vulnerability but have not yet taken steps to close the loophole.
Our advice to Kindle Touch owners is to stick to browsing only reputable websites and downloading books from reputable sources for the time being. Also to turn off Wi-Fi when it is not being used.