Is it just a local issue?
I haven't read anything that says the attacker has to be in close proximity to the device, which implies that any malware--even a drive-by web page--may be all it takes. I'll admit I simply do not know and since the smartphone I use does not use an Exynos 5 processor (but rather an Samsung-burned A5 Apple-designed processor) I believe I'm safe from this particular attack.
As far as "other brands have experienced this as well," well even the article stated that, pointing out that the Exynos 5 processor is used in a number of different brands, though the user may not be aware of that fact.