Description
The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has two user accounts with default passwords, including a hardcoded service account with the username true and password true. These accounts can be used to login to the web interface, exploit authenticated command injections and change router settings for malicious purposes.
References (5)
Core 5
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://seclists.org/fulldisclosure/2017/Jan/40
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://ssd-disclosure.com/index.php/archives/2910
Technical Description, Third Party Advisory x_refsource_misc
https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/
Exploit, Third Party Advisory x_refsource_misc
https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt
Broken Link x_refsource_misc
http://www.zyxel.com/support/announcement_unauthenticated.shtml
Scores
CVSS v3
8.8
EPSS
0.0517
EPSS Percentile
90.0%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-798
Status
published
Products (3)
billion/5200w-t_firmware
7.3.8.0
zyxel/p660hn-t1a_v1_firmware
7.3.15.0
zyxel/p660hn-t1a_v2_firmware
7.3.15.0
Published
May 02, 2019
Tracked Since
Feb 18, 2026