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First off, an "EMP attack" is not going to deliver a malign software load. It's "white-out conditions" with every long harness wire going "X" at once. Probably crowbar a supply (for latchup quench) and forget the other magical thinking about a clean code load meanwhile. You will either survive and reboot, or you won't.

Now next you imagine some "high frequency attack". Again this could cause malfunction, damage if the "victim" has a built-in destructive failure mode that can be triggered by pin electrical stimulus. But getting from "RF on {n} pins" to "demodulate and correctly store code bits, 100.000%"

ain't gonna happen, unless the RF comes looking like your host network and access granted.

A steel cookie can would solve RF when not in use. Your consumer PC and mobile phone have weak ICs no doubt but "antenna" length is very short compared to the systems that care about flying right through nuc EMP, and if you're close enough to the party to see handheld electronics killed, you won't be waking up yourself.

TV gets it wrong to make the story interesting.

If you are serious about physical-layer protection there are folks who try to make parts to do it. You aren't going to retrofit into modern assemblies easily and the price is fear-based.

In these designs you want criticized or improved, I first must question what, or whether you know anything about the piece-part threat response, which might well be more pain caused than prevented.

Probably said too much already in this "international forum".