You can take a look at the Advance Filters for the various built-in reports in Protect. For instance, you could choose the Condensed Patch Listing report and then change setting using Advanced Filters. You can filter this report by Vendor Severity in the Patches > Severity section of the Advanced Filters. It doesn't show patch release dates though.
If those don't fit your needs then you should take a look at this document Report Views Guide