You can use the RSSCAUTH report to change the authorization group of a program. The program authorization group is used as a parameter of the S_PROGRAM authorization object when you execute a report. It is therefore an essential criterion for determining whether or not a user can execute a report.
However, the RSCSAUTH report is insufficiently protected against uncontrolled execution:
When you start the RSCSAUTH report, the system only checks whether the user has an authorization (that includes the “SAP_ALL” value in the “Authorization group ABAP program” authorization field) for the S_PROGRAM authorization object.

This means that it is frequently possible for a large group of people to execute RSCSAUTH. This is undesirable because of the far-reaching effects that the use of the RSCSAUTH report can have.