POA-94613 5.5.9HF: Staff member with privilege 'All Users' set to 'Disabled' can see list of sessions
POA-94573 5.5.9HF: Provider's Staff Member with only 'Own CP Access' privilege in POA can edit Apache service default configuration and NG default configuration
APS-26339 5.5.9HF: Staff member with privilege 'All Users' set to 'Disabled' can see list of users
Hotfix can be downloaded here.
Use pa_updates_installer (http:/kb.odin.com/111323) to install this hotfix. Also this hotfix will be installed automatically during upgrade to OA 5.5.9 via pa_updates_installer. To install hotfix manually obtain its distributive from the link above and follow instructions found in file UPDATE.txt of distributive.