It is possible to access the remote NFS shares without having root privileges. Description : Some of the NFS shares exported by the remote server could be mounted by the scanning host. An attacker may exploit this problem to gain read (and possibly write) access to files on remote host. Note that root privileges were not required to mount the remote shares. That is, the source port to mount the shares was bigger than 1024.
Configure NFS on the remote host so that only authorized hosts can mount the remote shares. The remote NFS server should prevent mount requests originating from a non-privileged port.