A total of 689 printer models from Brother, along with 53 other models from Fujifilm, Toshiba, and Konica Minolta, come with a default administrator password that remote attackers can generate. Even worse, there is no way to fix the flaw via firmware in existing printers. […]
from https://www.bleepingcomputer.com/news/security/brother-printer-bug-in-689-models-exposes-default-admin-passwords/