dbcve.org
G416 FirmwareOperating system · Dlink

CVE-2023-50212

MEDIUM · 6.5 CVSS v3.1 Published 2024-05-03
Fix available
A fix is available. Upgrade to 1.09b01 or later.
See remediation →
70/100
Remediation priority · Elevated
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
D-Link G416 httpd Improper Handling of Exceptional Conditions Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link G416 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HTTP service listening on TCP port 80. The issue results from the lack of proper handling of error conditions. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-21664.

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 · moderate confidence

The vulnerability exists in the httpd service on D-Link G416 routers listening on TCP port 80. The issue stems from improper handling of error conditions, allowing network-adjacent unauthenticated attackers to disclose sensitive information. This information disclosure can be chained with other vulnerabilities to achieve root-level code execution.

MitigationRestrict network access to the router's HTTP admin interface (port 80) to trusted network segments only. Apply any available firmware updates from D-Link. If no patch exists, consider network segmentation or replacement of the affected device.

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
G416 FirmwareOperating system
Affected:< 1.09b01

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
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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 the device model
    Access the router admin interface or check the device label to confirm the model is D-Link G416
    Affected if The device is not a D-Link G416 router - this CVE does not apply
  2. Check the firmware version
    Log into the router admin panel (usually at 192.168.0.1 or 192.168.1.1) and navigate to the Status or System Information page to view the firmware version. Alternatively, check the firmware file name if you have access to the firmware binary.
    Affected if Firmware version is 1.09b01 or higher - the vulnerability has been patched in this version and later
  3. Verify httpd service is listening on port 80
    From a network-connected host, use a tool like 'nmap -p 80 <router_ip>' or 'telnet <router_ip> 80' to check if TCP port 80 is open and responding
    Affected if Port 80 is not listening or is filtered/blocked - the vulnerable service is not exposed
  4. Confirm network accessibility of the HTTP admin interface
    Attempt to access http://<router_ip>/ from a network-adjacent host. If the login page loads, the interface is accessible.
    Affected if The HTTP admin interface is not reachable from your network position - attackers would need network adjacency to exploit this flaw

You are affected if you have a D-Link G416 router running firmware version earlier than 1.09b01 with the HTTP service on port 80 accessible from an untrusted network segment.

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.

dbcve · scoped
Upgrade available Upgrade to 1.09b01 or later
Fixed in 1.09b01
Interim mitigation

Restrict network access to the router's HTTP admin interface (port 80) to trusted network segments only. Apply any available firmware updates from D-Link. If no patch exists, consider network segmentation or replacement of the affected device.

Recommended fix High confidence

Firmware version 1.09b01 or later

  1. 1. Navigate to the D-Link support website (supportannouncement.us.dlink.com) or the official D-Link support page for the G416 router
  2. 2. Locate the firmware download section for the G416 model
  3. 3. Download the firmware version 1.09b01 or later
  4. 4. Access the router's web management interface by connecting to the router via Ethernet or Wi-Fi and navigating to the router's IP address (typically 192.168.0.1 or 192.168.1.1)
  5. 5. Log into the router administration panel with administrator credentials
  6. 6. Navigate to the 'System' or 'Management' settings section
  7. 7. Select the 'Firmware Upgrade' or 'Software Update' option
  8. 8. Click 'Choose File' or 'Browse' and select the downloaded firmware file (1.09b01 or later)
Caveat Firmware updates may reset router configuration to defaults; backup current settings before upgrading and reapply after upgrade if needed

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in G416 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
32.0 hours of engineering $5,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2023-50212 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2023-50212 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data