Samsung Smart TV Security Hole Exposes Remote Access with Root Admin Privileges
According to Threat Post, security researcher Luigi Auriemma has discovered a vulnerability in some Samsung smart TVs that allows one to remotely access the TV, nab files located on a USB flash drive connected to the TV, reconfigure the TV’s remote control, and even gain root access and load up malicious software.

That’s about as vulnerable as a device can get.
It’s unsettling that even an app-based device like smart TV’s can be hacked so completely, but it’s a good thing that there are people like Auriemma find them. However, Auriemma and his company ReVuln don’t disclose vulnerabilities to vendors, which is unfortunate, but he did post a helpful video.
In any case, Auriemma’s best advice to consumers for avoiding this exploit is to disable the smart TV’s online functionality--which will seriously hamstring the device’s usefulness.