New, by me: A Middle East surveillance vendor has been caught exploiting a new attack in SS7, a set of protocols used by phone carriers, that can trick a phone operator into disclosing a person's phone location without their knowledge.

TechCrunch
A surveillance vendor was caught exploiting a new SS7 attack to track people's phone locations | TechCrunchThe new SS7 bypass-attack tricks phone operators into disclosing a cell subscriber's location, in some cases down to a few hundred meters.