Apple release an update for Apple TV devices, the new update is tvOS 10.2.1 and have many bug fixes and some security improvements.
Below links from Apple website :
Download tvOS 10.2.1
10.2.1 (ATV 4): AppleTV5,3_10.2.1_14W585a_Restore.ipsw
Previous versions :
How to Update Apple TV to latest version tvOS 10.2.1 ?
- Launch the Settings app.
- Then System > Software Update.
- If you have your Apple TV set to update automatically, it may already be installed, or the process may start on its own when you turn on your Apple TV.