Samsung A5 which was released back in January experienced a "critical" security flaw of an undisclosed nature which was found and fixed by a quick patch from Samsung back in early November of 2016.

Recently, it seems another flaw have been detected in the Galaxy A5. This time, the 128-megapixel quick fix does not include any new security patches or features, though the entire 2016 Galaxy A family is supposed to be eventually getting updated to Android 7.0 (Nougat). The new update seems intended entirely to fix up this "critical flaw", though Samsung is being tight-lipped about just what the flaw is, perhaps for security's sake.

It is highly unlikely that Samsung has packed anything else in the update aside from the stated fix for a critical flaw of some sort of thing. The phone currently is running on Android 6.0 (Marshmallow), which carries a number of inherent possible system and flaws in it.

Samsung could be patching just about anything with Android, TouchWiz, or something deeper in, like the kernel or a security concern within the software. The patch is already out to all variants of the 2016 Galaxy A5 worldwide, but it's reasonable that Samsung would not want to let out any details on what the flaw may have been at this stage. Obviously, there could be a few hold-outs who either have not taken the patch just yet or who haven't had it reach them yet.

With all the quickie update from the manufacturer, the patch may not be about the security of the device at all. There could be as reports suggested, many numbers of reasons for the update including blocking an exploit that allowed users to root the device or unlock the bootloader to install any custom firmware.

Whatever the flaw is, is should be available for all users now, so if customers having the Samsung Galaxy A5 can't see it, a reboot of the device may do it.