Description:
The rpWLANRedirect.asp ASP page is accessible without authentication
on ZyXEL P-660HN-T1 V2 (2.00(AAKK.3)) devices. After accessing the
page, the admin user's password can be obtained by viewing the HTML
source code, and the interface of the modem can be accessed as admin.

Solution:
The manufacturer has released the hotfix via dropbox for the current
vulnerability.

https://www.dropbox.com/s/2o8tl9o91mza4em/200AAKK3D0_20190130.zip?dl=0

CVE-2019-6725