Whilst not quite the same, but I believe most phones, including apple ask you to ok the EULA when first used. To allow manufacturers to take no responsibility for product faults, hacks, botnets etc. I believe this EULA would give this to them. Normally the bit which you just click and agree with. And nobody reads this anyhow.
So this would draw a point as to who in fact takes responsibility for products, installers would need to think about legal disclaimers, and also that you act on behalf of the customers. It's only going to matter when someone is hit with a legal problem!
So maybe your next product you should ask the manufacturer for a copy of the A&E specifications, which conform to Construction Specification Institute.
Judge their response with, if they even have a clue what this means.
AFAIK No Chinese manufacturer publishes such documents online, or in support documents.
A&E are a great to fully understand what your device is actually going to do in clear English. Nothing hard but it also serves as a kind of specification. I believe government and higher level customers would demand such details.
Maybe for now BotNet is yesterdays talk, but it's still there lurking in the dark. And could it be when you are installing now is a ticking time bomb!