ALL FIRMWARE should be updated. More info: https://betanews.com/2017/10/16/krack-wpa2-security-vulnerability/
I will be looking for a patch to this vulnerability (Krack) for the Orbi RBR50. It seems all routers (from all manufacturers) are susceptible since 2003 that use WPA or WPA-2. It’s a fundamental flaw in the underlying encryption protocol.
Hopefully Netgear can get the patch out soon.