Samsung Galaxy S6 Active was introduced way back in 2015. The smartphone was rugged variant of the original Samsung Galaxy S6 . The Samsung Galaxy S6 Active smartphone was launched with Android Lollipop out of the box. It was introduced with latest security patches from Google available at that time.
Now the Samsung Galaxy S6 Active has received a new Android Security Patches from Google. Currently the Samsung Galaxy S6 Active is getting the December security patches. The Update is available for Samsung Galaxy S6 Active on AT&T . The build number for this update is G890AUCS5CPK4. It has a size of just 14MB in total. Apart from the December security patches, there isn’t anything else mentioned in the official changelog.
As usual, the official OTA will come in phases. So you need to be patient in order to get this update to your device. Till then you can check manually by going to Settings>About Phone>System Update