The official download link for ArcGIS Desktop 10.8.2 is:
Some organizations still use custom VBA scripts that are not supported in ArcGIS Pro. download arcgis desktop 1082 link
The only legitimate way to download ArcGIS Desktop 10.8.2 is through an authorized account on the My Esri portal. ArcMap Life Cycle - Esri Support The official download link for ArcGIS Desktop 10
Ensure you select version 10.8.2 from the dropdown menu. download arcgis desktop 1082 link
Ask your GIS administrator to log into the Esri Customer Care Portal ( my.esri.com ) and regenerate the download link for version 10.8.2. They can also share the original ISO from their internal server.