Hmmm
I assume that security problem only applies to a ReadyNAS which is accessible from the 'net?
I have a 6x3TB ReadyNAS at home (I rip my CDs/DVDs/BDs to it without re-compressing) but it is behind a router with no port-forwarding, so unless someone convinces me otherwise I will not risk updating the firmware, potentially loosing my files and spending 4+ hours re-initialising the RAID array if it goes wrong.