Samsung's Galaxy S6 was released in Q2 of 2015 and marked a new chapter for Samsung as it shed itself of cheap plastic body's and went towards glass and metal for the Galaxy S. The phone launched with Lollipop (5.0) out of the box and received the latest version of Nougat as its latest major Android update. Since then, it has been receiving regular security updates that help to protect against new vulnerabilities as per Google's monthly security bulletin. Samsung's security website no longer lists the Galaxy S6, Galaxy S6 edge, Galaxy S6 edge+, and Galaxy S6 Active as devices that are...
Source: https://www.gsmarena.com/samsung_galaxy_s6_models_will_no_longer_get_security_updates-news-30388.php