CVE-2017-18371

high-risk
Published 2019-05-02

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.

Do I need to act?

!
72.7% chance of exploitation in next 30 days
EPSS score — higher than 27% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Zyxel Billion

References (10)

Broken Link http://www.zyxel.com/support/announcement_unauthenticated.shtml
Exploit https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline....
Exploit https://seclists.org/fulldisclosure/2017/Jan/40
Exploit https://ssd-disclosure.com/index.php/archives/2910
Technical Description https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireles...
Broken Link http://www.zyxel.com/support/announcement_unauthenticated.shtml
Exploit https://raw.githubusercontent.com/pedrib/PoC/master/advisories/zyxel_trueonline....
Exploit https://seclists.org/fulldisclosure/2017/Jan/40
Exploit https://ssd-disclosure.com/index.php/archives/2910
Technical Description https://unit42.paloaltonetworks.com/new-mirai-variant-targets-enterprise-wireles...
60
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 19/34 · Moderate
Exposure 9/34 · Low