It has been mentioned before, their security is very poor in general. Backdoors are not really needed when you can pretty easily get in the front door.
If you want to get an idea of what real hacking is like, this long video goes into great detail on how to crack one series of Huawei router.
Someone says they got some proof of some sort of threat? Okay. Then put up. Or shut up.
Umm… ok:
