E.G: Microsoft being American (and them being part of PRISM), I just assume the OS has a backdoor for the US gov. Now with Windows 10 heavy telemetry, it's even easier.
I work for a client doing chips for credit cards. Did you know they are now full blown computers that can run a light version of Java (Java Card) ? The company is building their own hardware and software, and just to get to a conference room, you need biometric access + badge + pin code. Pretty sure they send data to my country agencies in some way despite having to trick the banking system to do so for them.
Same from any software, server/cloud hosting or hardware. If it comes from a specific country, this country is most probably using it for intelligence. It doesn't even need to be on a network now, because there is so much interactivity with all devices. And eventually, one will be.