After upgrade to one of the last 4 versions we frequently noticed the router set the admin password with blank and set the files directory to read only and more I can't save a new configuration. Only after reboot the router goes back to normal status.
Is very dangerous, somebody can access remotely my router if password is blank. Please, I need request assistance to that problem.
I can't save suport.rif because files directory is only read. I already noticed this problem in another router too.