A guest user can access an SMB share
Microsoft Windows SMB Guest Account User Access
A Windows NT domain user or administrator account has a guessable password.
The remote host is running one of the Microsoft Windows operating systems or the SAMBA daemon. It was possible to log into it as a guest user using a random account.
Unitrends Risk Assessment: None.
On Unitrends only the public share allows guest access and the configuration only exposes one public /backups/samba share which is usually empty, rather than exposing all disks as would be the case for Windows servers.