You will find all Technical and Security Bulletins and Notices published on Support by refining by Content Type as shown below:
Soon after new bulletins are published on Community, blog articles are posted announcing each new bulletin on their respective product blog in Community in order to reach the appropriate audience.
Examples:
To receive email notifications for new Bulletins and Notices, you will need to Follow to the specific product blogs of your choice.
Ex. Go to the OnBase Technical Blog, press Follow.
You can customize your Notification Preferences to receive updates by email or just in Community: