No, all systems can be hacked, new methods and technologies are discovered are developed constantly.

The only encryption system that I know of that is in fact unbreakable is the one time pad system, but that only works if the crypto technician uses it correctly. During actual use, reuse of codes have enabled other parties to decrypt messages.

The Enigma machine was thought to be unbreakable, but had serious flaws that when discovered, enabled the Allies to systematically find the key and decrypt messages.

The Seimens & Halske T52 was an even more secure encryption machine, was also cracked during WW2, and enabled Sweden to listen in on messges to and from Norway.

I use these examples as they were designed to be unbreakable, similarly to modern computer system which are often designed to prevent hacking.

The PS3 was considered unhackable for years, but people kept working the problem, untill a way in was found, it was patched, but new methods were found, and so on.

Same goes for anything, so keep your devices up to date if you want them as secure as they can be with the current knowledge.