Try opening the .dbf file in Excel or other program that supports opening the .dbf format or make use of following way in case .dbf file severely corrupted https://onlinefilerepair.com/en/dbf-repair-online.html
DBF files Online repair service
Once opened in Excel you should be able to view the file, delete any "bad data", and resave to a new name (with the .dbf extension).
Also possible to create a new table with the structure of the old table, append records from the old to the new. May salvage records until the corruption is encountered.