CVE-2017-18371

CRITICAL

Billion 5200w-t Firmware - Hard-coded Credentials

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-18371. PoCs published by Pedro Ribeiro <[email protected]>, including Metasploit module exploits/linux/http/trueonline_p660hn_v2_rce.

AI-analyzed exploit summary This Metasploit module exploits an authenticated command injection vulnerability in the TrueOnline / ZyXEL P660HN-T v2 router. It leverages default credentials to authenticate and inject commands via the log forwarding page, ultimately downloading and executing a MIPS payload via TFTP.

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.

Exploits (1)

metasploit WORKING POC EXCELLENT
by Pedro Ribeiro <[email protected]> · rubypoclinux
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/trueonline_p660hn_v2_rce.rb

This Metasploit module exploits an authenticated command injection vulnerability in the TrueOnline / ZyXEL P660HN-T v2 router. It leverages default credentials to authenticate and inject commands via the log forwarding page, ultimately downloading and executing a MIPS payload via TFTP.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: ZyXEL P660HN-T v2 (TrueOnline customized firmware)
Auth required
Prerequisites: Network access to the router's web interface · Default credentials (supervisor:zyad1234) · TFTP server reachable from the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://seclists.org/fulldisclosure/2017/Jan/40
Exploit, Technical Description, Third Party Advisory x_refsource_misc
https://ssd-disclosure.com/index.php/archives/2910

Scores

CVSS v3 9.8
EPSS 0.7274
EPSS Percentile 98.8%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-798
Status published
Products (3)
billion/5200w-t_firmware 7.3.8.0
zyxel/p660hn-t1a_v1_firmware 7.3.37.6
zyxel/p660hn-t1a_v2_firmware 7.3.37.6
Published May 02, 2019
Tracked Since Feb 18, 2026