Samsung is pushing out April 2018 security patch to its phones, all of the budget phones are also on the line for this patch next ones are Galaxy A8 (2018) and Galaxy J7 Prime.
The Galaxy A8 (2018) and Galaxy J7 Prime receiving April 2018 security patch and firmware versions are A530FXXU2ARD1 and G610FXXU1BRC1 respectively. You can download the update manually by going to Settings » Software update menu on your phone.
This update brings fixes for seven critical Android vulnerabilities and eight vulnerabilities that only affect Samsung’s software. Of course, a slew of low and medium-risk vulnerabilities have also been patched to enhance the overall security of these devices.