[olliej]

But look at the industry - "Big iron" (Cisco, network solutions?, juniper, dynalink ...) have all had these issues, over and over and over again.

Given the lack of subtlety and the wide spread existence of these same exploits/backdoors/bugs indicates there's a level of care that is missing in engineering of these devices that makes it plausible that this is by ignorance rather than malice.

[monocasa]

You know who's big iron routers haven't had the issue of continuously appearing explicit backdoors? Huawei.