Any mobo will let you download the firmware file to a FAT32-formatted USB drive etc, and then use that to update the UEFI within the UEFI UI.

Yes some mobos have the feature in their UEFI to connect to the internet and download the update, but it's best to not rely on that since you have no idea how securely that is implemented. Considering how the submitted article is about a shitty implementation in a regular Windows program, you can be sure the implementation in UEFI is even shittier (may not check certs, may not even use HTTPS, etc). Asrock used to have an "Internet Flash" feature in their UEFI and then suddenly removed it, probably because it was too insecure to fix.