PC Companion is a computer application that acts as a portal to Sony Xperia and operator features and applications, such as phone software updates, management of contacts and calendar, media management with Media Go, and a backup and restore feature for your phone content.
The vulnerability is caused due to a boundary error in PluginManager.dll when handling the value assigned to the 'Path' item in the Admin_RemoveDirectory function and can be exploited to cause a stack-based buffer overflow via an overly long string which may lead to execution of arbitrary code on the affected machine.