The title says it all: http://support.wdc.com/downloads.aspx?lang=en
Whoops! Already posted!!
Bit late to the game. 
WD announcement:
https://community.wd.com/t/new-release-wd-my-cloud-firmware-version-04-04-03-113-5-23-16/164910
Discussion thread:
https://community.wd.com/t/firmware-04-04-03-113-discussion/164941
Yep, I rarely check in and missed the first post when I did!
