How to assign data in a cursor from an exec and not a select

Context: I have several files in a folder, so I do not want to put the path one by one, so I need to add my command variables.

Set @nome_arquivo = '252203408.xlsx'
Set @sql='SELECT * 
FROM OPENROWSET(
               ''Microsoft.ACE.OLEDB.12.0'',
               ''Excel 12.0 Xml;Database=\00.000.00.000\Arquivos Power BI\TI\Arquivos Base Excel\Rateio\' + @nome_arquivo + ';HDR=YES;'',
               ''SELECT * FROM [Rateio$]'')'

--Cursor para percorrer os registros
DECLARE cursor_telefonia  CURSOR LOCAL SCROLL FOR

    Exec(@sql)

It can execute the query, but when placed inside the cursor does not work and I need this inside the cursor to be able to take all the fields and then work on the other checks. How to make the cursor read this?