The unauthenticated attacker in NetWeaver AS Java Logon application - version 7.50, can brute force the login functionality to identify the legitimate user ids. This will have an impact on confidentiality but there is no other impact on integrity or availability.
https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html