Before panicking, check to see that it's even installed. I just checked my PC (Ubuntu 16.04 desktop), and it's not installed by default.
I've not had anything to do with "rpcbind" myself, but from what little I've seen about it, it appears to be mainly used with NFS servers.
According to the on-line man pages, it seems to originally be a BSD program which was ported to Linux in the very early days. Given that, it's quite possible that this may affect any version of BSD or Apple Mac OSX as well.