No, it doesn’t. Commands could be authenticated using a pre-shared secret. Even public cryptography existed prior to Voyager 1’s launch (by a year).
Based on the state of computer security at that time I would guess that’s unlikely, but then again it was the Cold War.
Anyway, just because it is possible it doesn’t mean anyone can do it.
Johanno@feddit.de 5 months ago
Yes if they can track them in middle of space.
It’s impressive that we can still send data to the satellite. I mean you need to send the signal to the place where the satellite will be in 24 hours.