Image fusing whitout USB or SD

Colibri Evaluation Board V3.2
Colibri iMX6ULL 1GB IT

If I use USB or SD card slot for other purposes, is there no way to update it?
Is there a way to update the device itself other than remote updates such as Ethernet?

There is no way . If you don’t have access to USB, SD, and Ethernet, what source would you like to use?

Why not just using USB HUB?