I work with logistics automation software. Most PLCs I've worked with are legacy and don't even support TLS. Doesn't surprise me at all. I honestly am baffled how old some of these sites are and never got a security upgrade.
Now with the EU cyber resiliency act things are moving but I think it's infeasible for many sites to meet modern security standards, because of both hardware and software.
Now with the EU cyber resiliency act things are moving but I think it's infeasible for many sites to meet modern security standards, because of both hardware and software.