To be of any real help you'd need to specify the device you're using and what the scans are saying.
Generally speaking, with these types of security scans you have a few options:
1. make sure you have the latest firmware, it could be detecting something that has been fixed already.
2. Turn off un-needed services. If it's detecting an FTP vulnerability and you don't need FTP, turn it off.
3. Adjust configuration. If the scan is complaining about a publicly accessible share or a weak password you should be able to correct those issues directly.
4. If it's a false-positive of some kind you could consider omitting it from future scans.
5. If the device is no longer supported you could consider moving to a newer device.