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Nbg 418n FirmwareOperating system · Zyxel

CVE-2015-7283

HIGH · 8.1 CVSS v3.0 Published 2015-12-31
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
90/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The web administration interface on ZyXEL NBG-418N devices with firmware 1.00(AADZ.3)C0 has a default password of 1234 for the admin account, which allows remote attackers to obtain administrative privileges by leveraging a LAN session.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The ZyXEL NBG-418N wireless router with firmware 1.00(AADZ.3)C0 ships with a hardcoded default password '1234' for the admin web interface. An attacker with LAN access can authenticate using these default credentials to gain full administrative control over the device.

MitigationChange the default admin password to a strong, unique password immediately. Verify if vendor firmware updates are available that address default credential issues, and consider disabling WAN management access to limit exposure.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Nbg 418n FirmwareOperating system
Affected:= 1.00\(aadz.3\)c0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify router model
    Check the physical device label on the router or log into the admin interface and look for the model name in the status or system information page.
    Affected if The device is a ZyXEL NBG-418N router
  2. Check firmware version
    Log into the admin web interface, navigate to the maintenance, system, or firmware upgrade section, and record the firmware version displayed.
    Affected if The firmware version is 1.00(AADZ.3)C0
  3. Verify admin password status
    Log out of the admin interface and attempt to log back in using username 'admin' and password '1234', or check the password change history in the administration settings.
    Affected if The admin password is still set to the default '1234' or has never been changed

The environment is affected if you have a ZyXEL NBG-418N router running firmware version 1.00(AADZ.3)C0 with the default admin password '1234' still in use.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Change the default admin password to a strong, unique password immediately. Verify if vendor firmware updates are available that address default credential issues, and consider disabling WAN management access to limit exposure.

Fix this in Nbg 418n Firmware Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2015-7283 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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