![]() ![]() Zyxel products are Linux-based, and Linux usernames and passwords are typically split between two files for security reasons. …yet it did have a password hash in the database itself, which was interesting all on its own. That name didn’t show up in the official list of usernames shown in the router’s user interface… ![]() He examined the password database that shipped in the firmware and noticed an unusual username of zyfwp. Towards the end of 2020, a researcher at Dutch cybersecurity company EYE was taking a look at the firmware of a Zyxel network router.
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