Western Digital My Cloud drives have a built-in backdoor

Previous discussion (2 days ago): https://news.ycombinator.com/item?id=16083337

Per the comments on the article (User Anubhav K):

This is real, or at least it was until November last year. Western Digital released a firmware update fixing all exploits and vulnerabilities.

It was an SMB exploit that enabled unauthorised access to shares.

This is patched in the firmware released in November.