CVSS 3.0
8.8 highCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2017-18374
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.
Severity
- EPSS
- 5.5% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)
- CWE
- CWE-798
- Published
- Modified
- Record from
- the NVD, synced
Affected
- billion:5200w-t_firmware
- zyxel:p660hn-t1a_v1_firmware
- zyxel:p660hn-t1a_v2_firmware
References
- http://www.zyxel.com/support/announcement_unauthenticated.shtml
- https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt
- https://seclists.org/fulldisclosure/2017/Jan/40
- https://ssd-disclosure.com/index.php/archives/2910
- https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/