Security Researcher Malik Mesellem who was specialized in IT Security audit and training from Belgium had proved that there is security vulnerability on Network Enabled Samsung TV using Denial of Service (DOS) attack, that helps the attacker to crash the device.
A simple learning on LAN address of the TV will help the attacker to crash the device and restart it. He published the proof of concept in his blog. The below video demonstrated by Malik which was tested on Samsung PS50C7700 plasma TV. The video explains that the attacked TV will restart and repeat the process.
This shows that there is also a problem with the Television systems and we need to secure those devices to have security in wireless platform. Wait for the updates and will provide you more details about this issue or any fix for your update.