{"id":"CVE-2017-18371","aliases":["EUVD-2017-9487","GHSA-j9rw-cgp6-m49q"],"status":"published","title":"The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user...","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.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.22531,"percentile":0.9772,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-798"],"published":"2019-05-02T16:15:05Z","modified":"2026-06-17T01:12:42Z","exploits":[{"source":"metasploit","id":"exploit/linux/http/trueonline_p660hn_v2_rce","title":"TrueOnline / ZyXEL P660HN-T v2 Router Authenticated Command Injection","type":"exploit","platform":"Linux","date":"2016-12-26","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/linux/http/trueonline_p660hn_v2_rce"}],"products":[{"vendor":"billion","product":"5200w-t_firmware"},{"vendor":"zyxel","product":"p660hn-t1a_v1_firmware"},{"vendor":"zyxel","product":"p660hn-t1a_v2_firmware"}],"references":[{"url":"https://seclists.org/fulldisclosure/2017/Jan/40","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory"]},{"url":"https://ssd-disclosure.com/index.php/archives/2910","tags":["x_refsource_MISC","x_transferred","Exploit","Technical Description","Third Party Advisory"]},{"url":"https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://www.zyxel.com/support/announcement_unauthenticated.shtml","tags":["x_refsource_MISC","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18371"},{"url":"https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems"},{"url":"https://github.com/advisories/GHSA-j9rw-cgp6-m49q"}],"sources":{"cve":[{"id":"CVE-2017-18371","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.","status":"published","published":"2019-05-02T16:15:05Z","modified":"2024-08-05T21:20:50.383Z","updated_at":"2026-11-02T14:33:22.064284Z"}],"euvd":[{"id":"EUVD-2017-9487","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.","status":"published","published":"2019-05-02T16:15:05Z","modified":"2024-08-05T21:20:50Z","updated_at":"2026-11-03T02:23:07.063551Z"}],"ghsa":[{"id":"GHSA-j9rw-cgp6-m49q","title":"The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user...","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.","status":"published","published":"2022-05-24T16:45:03Z","modified":"2024-04-04T00:25:28Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:55:50.017793Z"}],"nvd":[{"id":"CVE-2017-18371","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.","status":"published","published":"2019-05-02T17:29:01.067Z","modified":"2026-06-17T01:12:42.453Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-798"],"updated_at":"2026-11-02T14:04:19.545286Z"}]}}