For 99%+ of residential users, the upstream peer is the router owner/operator, so they can just direct the router to hack you if they wished. So this NAT "vulne

For 99%+ of residential users, the upstream peer is the router owner/operator, so they can just direct the router to hack you if they wished. So this NAT "vulnerability" is not useful in practice, since it can only be used by your upstream which already "owns" you.