When we read in the press about “hacking”, it’s mostly about software-based attacks. It may be about exploiting a vulnerability to reveal passwords or attacking an insecure computer.
Tiny hardware back-doors can be baked inside any integrated circuit. It’s not news that this is doable, but what is news is that it’s way too easy to achieve and almost impossible to detect. Even in the case of the highly advanced computer processors that are inside all our devices. Apparently it can be done by a single (well trained) person working inside the factory that manufactures the chip.