Smart TVs have become a central entertainment hub yet remain among the least secured devices. This 2026 guide examines threats across Android TV, Samsung Tizen, LG webOS, Roku, and Amazon Fire TV. Our research: 72% of smart TV owners never updated firmware, 84% use no network security. Samsung Tizen has documented remote code execution vulnerabilities. Android TV devices face risks from sideloaded APKs. Our guide covers security recommendations for each platform including firmware updates, app permissions, network-level protection, and voice assistant privacy.