CVE-2017-18371 in the critical feed json
The ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router distributed by TrueOnline has three user accounts with default passwords, including two…
published 2019-05-02 7 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9487
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 22.5%
- EPSS 22.5% chance of exploitation in 30 days, percentile 97%
- public exploits
- 1
- Metasploit
Summary
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.
Timeline
- First public exploit (Metasploit exploit/linux/http/trueonline_p660hn_v2_rce)
- Published
Exploit prediction
22.53% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/linux/http/trueonline_p660hn_v2_rce TrueOnline / ZyXEL P660HN-T v2 Router Authenticated Command Injection metasploit exploit, excellent rank, 2016-12-26
- seclists.org https://seclists.org/fulldisclosure/2017/Jan/40 referenced PoC, tagged "exploit" by a source, unverified
- ssd-disclosure.com https://ssd-disclosure.com/index.php/archives/2910 referenced PoC, tagged "exploit" by a source, unverified
- raw.githubusercontent.com https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txt referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-798 Use of Hard-coded Credentials
References
-
seclists.org
/fulldisclosure/2017/Jan/40
exploit, mailing-list, third-party-advisory
-
ssd-disclosure.com
/index.php/archives/2910
exploit, technical-description, third-party-advisory
-
raw.githubusercontent.com
/pedrib/PoC/master/advisories/zyxel_trueonline.txt
exploit, third-party-advisory
-
unit42.paloaltonetworks.com
/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/
technical-description, third-party-advisory
-
zyxel.com
/support/announcement_unauthenticated.shtml
broken-link
Sources
- CVE List CVE-2017-18371
- NVD CVE-2017-18371
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.