Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2017-18371

54
FAUCET Score

CVE-2017-18371 details a critical vulnerability in the ZyXEL P660HN-T1A v2 TCLinux Fw #7.3.37.6 router, specifically those distributed by TrueOnline. The flaw stems from three default user accounts, including two hardcoded service accounts ("true:true" and "supervisor:zyad1234"), which allow unauthenticated access to the web interface. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability through authenticated command injections and router setting modifications. While not listed on the KEV catalog, a Metasploit module exists for exploitation, indicating readily available exploit code, though there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
7.3.8.0CPE matchmatch criteria
cpe:2.3:o:billion:5200w-t_firmware:7.3.8.0:*:*:*:*:*:*:*
7.3.37.6CPE matchmatch criteria
cpe:2.3:o:zyxel:p660hn-t1a_v2_firmware:7.3.37.6:*:*:*:*:*:*:*
7.3.37.6CPE matchmatch criteria
cpe:2.3:o:zyxel:p660hn-t1a_v1_firmware:7.3.37.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
22.53%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Metasploit: TrueOnline / ZyXEL P660HN-T v2 Router Authenticated Command Injection · Dec 26, 2016
This CVE's current EPSS score of 0.2253 is in the 94th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

raw.githubusercontent.com / pedrib/PoC/master/advisories/zyxel_trueonline.txt
ExploitThird Party Advisory
seclists.org / fulldisclosure/2017/Jan/40
ExploitMailing ListThird Party Advisory
ssd-disclosure.com / index.php/archives/2910
ExploitTechnical DescriptionThird Party Advisory
unit42.paloaltonetworks.com / new-mirai-variant-targets-enterprise-wireless-presentation-display-systems
Technical DescriptionThird Party Advisory
zyxel.com / support/announcement_unauthenticated.shtml
Broken Link