Adobe will not distribute or make your font available to any other user. When you add a font to Creative Cloud, Adobe will not modify it, but we will store the font in Creative Cloud, and may make and distribute copies for your use on computers and other devices where you log in with your Adobe ID. To help you decide, here are some of the ways that fonts are managed when they are added to Creative Cloud with this feature.
Make sure to read and understand the end user license agreement (EULA) that describes the permitted rights and uses for your font, and to avoid any feature or workflow that violates your EULA - or abstain from using this feature entirely.