You don't need the hacking capabilities of a government, simply transferring files (like child porn) onto someone's computer without them knowing would be trivi

You don't need the hacking capabilities of a government, simply transferring files (like child porn) onto someone's computer without them knowing would be trivial to do once an exploit is found on the target's computer - certainly a lot simpler than ransomware which seems pervasive. Surprised it does not happen more often considering how easy it is, or maybe it does, after all who is giving an accused pedophile the benefit of the doubt?