Internet-Security.com TCP port 8190 details

SAP NetWeaver Message Server exposes a web/HTTP administration and monitoring interface on TCP port 81NN; for systems with instance/system number 90 this is port 8190.
Example: In many SAP installations, the profile parameter ms/http_port is set to 81, so the message server’s web UI (msmon) is reachable at http://host:8190 for SAP system number 90.
This interface shows instance lists and routing info and is used by SAP administrators and supporting components (e.g., Web Dispatcher) for status and topology.
Security note: Attackers often scan port 81xx/8190 for exposed SAP Message Server interfaces, which can leak system details and have been implicated in SAP-targeted attack chains; restrict access and keep systems patched.

TCP 8190