the majority of Manufacturers does not conduct security audit this can be a serious problem for blockchains using only one type of hardware!
I tried to contact manufacturers but only one replied so far, some don't even have a support email!
protect your network correctly.
install alternative firmware if possible (like @braiins_systems or contact professionals like @FarmGod_io ....
If someone know how to contact those brand
Aisen, Cheetah, Dayun....