From Canon USA:
Products
Connection Station CS100
Details
Firmware Version 1.2.0 incorporates the following fixes:
This firmware is for Connect Station CS100 with Firmware Version 1.1.2. In order to update the firmware, the CS100 device must be connected to the Internet. Please see detailed instructions below.
For the full update procedure, see the Canon USA's CS100 Firmware Version 1.1.2 upgrade post.