CVE-2017-18371

Name: CVE-2017-18371
Creator: NVD / NIST
Published: 2019-05-02T17:29:01.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 22.53%

Last modified Jun 17, 2026

CVE-2017-18371 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 22.53% chance of exploitation in the next 30 days.

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

EPSS Probability

22.53%

97.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Billion	5200w-T Firmware	7.3.8.0
Zyxel	P660hn-T1a V2 Firmware	7.3.37.6
Zyxel	P660hn-T1a V1 Firmware	7.3.37.6

References

http://www.zyxel.com/support/announcement_unauthenticated.shtmlBroken Link
https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txtExploit, Third Party Advisory
https://seclists.org/fulldisclosure/2017/Jan/40Exploit, Mailing List, Third Party Advisory
https://ssd-disclosure.com/index.php/archives/2910Exploit, Technical Description, Third Party Advisory
https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/Technical Description, Third Party Advisory
http://www.zyxel.com/support/announcement_unauthenticated.shtmlBroken Link
https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline.txtExploit, Third Party Advisory
https://seclists.org/fulldisclosure/2017/Jan/40Exploit, Mailing List, Third Party Advisory
https://ssd-disclosure.com/index.php/archives/2910Exploit, Technical Description, Third Party Advisory
https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireless-presentation-display-systems/Technical Description, Third Party Advisory

Timeline

Published: May 2, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-18371?

How severe is CVE-2017-18371?

Severity scoring for CVE-2017-18371 is pending analysis. The EPSS model estimates a 22.53% probability of exploitation in the next 30 days.

How do I fix CVE-2017-18371?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-18371?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST