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-2015-6016

32
FAUCET Score

CVE-2015-6016 describes a critical vulnerability affecting several ZyXEL devices, including the P-660HW-T1 2, PMG5318-B20A, and NBG-418N, due to a hardcoded default administrator password of "1234". This allows remote attackers to gain full administrative access with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation. The high CVSS score of 9.8 and FAUCET Risk Score of 94/100 underscore its severe impact.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:zyxel:nbg-418n:-:*:*:*:*:*:*:*
3.40\(axh.0\)CPE matchmatch criteria
cpe:2.3:o:zyxel:zynos_firmware:3.40\(axh.0\):*:*:*:*:*:*:*
v100aanc0b5CPE matchmatch criteria
cpe:2.3:o:zyxel:pmg5318-b20a_firmware:v100aanc0b5:*:*:*:*:*:*:*

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
5.73%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0573 is in the 87th 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

kb.cert.org / vuls/id/870744
Third Party AdvisoryUS Government Resource
kb.cert.org / vuls/id/BLUU-9ZQU2R
Third Party AdvisoryUS Government Resource
securitytracker.com / id/1034552
securitytracker.com / id/1034553
securitytracker.com / id/1034554