Sensationalism is definitely the right word for this. The article talked more about "white-noise attacks" on NNs than anything else, but I've yet to hear of a white-noise attack that did anything worse than make a NN misidentify an object. Sure, in the right system, that could possibly wreak havoc, but right now, it's not much more than a parlor trick. Maybe if an attacker knew enough about their targeted model, they could have a little more control over the outcome, but that would require some white-box insight to the model. But just because it's possible to feed corrupted pictures into a NN until it breaks isn't enough to call this an "emerging security crisis".