lol if you know the answer, tell me.
How about you actually do some reading and then research before making useless posts? That's what you should be doing.I know there's a backdoor. Is it an old backdoor?
It has been in existence for at least half a year (most likely longer).Is it relevent?
Yes.There are standard backdoors in everything from hardware routers to iphones(I'm not certain many posting in this thread know that).
False comparison fallacy. That's really not relevant.Not everyone has time to look at the specifics of the exploit & figure out whether it can be used to gain root access in a way that would allow someone to steal crypto or do some other nefarious deeds.
It can only shut down 70% of the network. Nothing really nefarious. 
Its hard to know who to believe with politics being involved & people saying things that are untrue to push their own self interest agendas.
Much thanks for the response btw!
I wonder if this was deliberately introduced as a way to shutdown bitcoin core miners to make it seem as if bitcoin core developers introduced bugs into their software, like the one which allows BU nodes to be shut down remotely.