The article doesn't seem to make clear that the 04 firmware which fixes this has been out for years (mid 2014, specifically). One nice thing about this device is that it is a real Linux system which can be used for hosting cheap services.
I only run mine on private/home networks with no remote access in to them.
Curious about the version difference...
Both firmwares were released in Nov 2017, and I suspect the vulnerabilities were fixed at that time as well. At the very least nas_sharing.cgi was removed in both versions. But I haven't had a chance to finish my investigations [3].
[1] https://support.wdc.com/downloads.aspx?g=907
[2] https://support.wdc.com/downloads.aspx?g=910
[3] https://gist.github.com/bmaupin/c38c777a0e4fad737a14718b1092...