https://www.bleepingcomputer.com/news/security/hackers-use-zero-day-to-mass-wipe-my-book-live-devices/

A zero-day vulnerability in Western Digital My Book Live NAS devices allowed a threat actor to perform mass-factory resets of devices last week, leading to data loss.

Last week, we broke the story that Western Digital My Book Live NAS owners suddenly discovered that their stored files had mysteriously disappeared. Unfortunately, the factory reset also reset the admin passwords, so users could not log in to their devices via the web dashboard or SSH.