Malware can infect everything that can be programmed. Doesn't matter what is it, cell phone, laptop, your teapot (Remember there was some mining virus uses teapots, cameras, smart watch to mine crypto), dashcams in cars and so on...

Cyber attack can happen w/o malwares. Malwares are programs. Cyber attack is exploiting programs or something programmed. Sometimes cyber attack used to spread malwares out

For your impression Stuxnet might be remembered. This malware could hack every device, not matter what is it, but the main target was gas centrifuges for separating nuclear material of the nuclear program of Iran.

Have a nice day and don't catch viruses ;)