CVE-2017-18371

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user accounts with default passwords, including two hardcoded service accounts: one with the username true and password true, and another with the username supervisor and password zyad1234. These accounts can be used to login to the web interface, exploit authenticated command injections, and change router settings for malicious purposes.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
May 2, 2019
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2017-18371: Critical severity, CVSS 9.8 | Vulnix