Some versions of internet-enabled SmartTVs are vulnerable to cookie theft and an array of other tricks that abuse a lax WiFi setting. The problem lies in Miracast, a WiFi feature that comes enabled by default, with a fixed password, no PIN, and no request of permission. The vulnerability allows anyone within range of the device s WiFi adapter to connect to the TV and access its many features. An attacker could also be able to glean some of the cookies used to access certain websites. The WiFi Alliance, a consortium in charge of overseeing all things WiFi said later Friday that it was looking into the vulnerability.
Source: https://threatpost.com/wifi-bug-plagues-philips-internet-enabled-tvs-2/105134/