I mean the Voyager 1 probe which is currently the human-made object the farthest away from earth. The space program people operating the mission seem to have great control options, they even “moved software from one chip to another” (link) Apart from the probably gigantic and expensive installation needed to receive and/or send messages from/to that far away from home (23 hours of delay?), are there any safety measures to prevent a potentially malicous actor from sending commands to the probe?
NASA use parabolic antennas that are 35+ meters in diameter and consume 20KW to generate the 0.01 degree beamwidth signal, that alone will demotivate hackers
My brain makes some dumb connections. This is basically Dom Joly with his enormous mobile phone, shouting INCREDIBLY LOUDLY into it.
Do not trust this man