CVE-2017-18374

moderate-risk
Published 2019-05-02

The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has two user accounts with default passwords, including a hardcoded service account with the username true and password true. 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?

~
5.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
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...
47
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 8/34 · Low
Exposure 9/34 · Low