Samsung is currently pushing out an update that brings the July security patch to the original Galaxy J5 in Europe. The 45MB update doesn't have anything else of importance, other than the usual bug fixes and performance improvements. As for the July security patch, it addresses a total of 65 Common Vulnerabilities and Exposures (CVE) in the Android operating system and 16 weaknesses in Galaxy-branded smartphones and tablets.
The update should be showing up on your phone in the near future, and you can also grab it by manually checking via the Settings » About device » Download updates manually menu. In case you were wondering when that supposed Nougat update will arrive on the Galaxy J5, well, there's no telling if the update will even arrive, given the J5 is two years old and came in near the bottom rung of Samsung's budget segment. For now, it's good to see the company continuing to push out security updates to such old devices, challenging the bad-mouthing it receives for its update policies.