Threat actors used an existing backdoor in a communications system to intercept communications in that system? Color me whatever the opposite of “shocked” is. This is exactly the problem which was brought up by security researchers when the NSA was asking for a frontdoor which would let them break encryption. Thankfully, we held the line in that battle of the Crypto Wars. But, the war never ends and we need to make sure folks remember this clusterfuck the next time the NSA starts pushing to break encryption.