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Dar 7000 FirmwareOperating system · Dlink

CVE-2024-4961

CRITICAL · 9.8 CVSS v3.1 Published 2024-05-16
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
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
** UNSUPPORTED WHEN ASSIGNED ** A vulnerability classified as critical was found in D-Link DAR-7000-40 V31R02B1413C. Affected by this vulnerability is an unknown functionality of the file /user/onlineuser.php. The manipulation of the argument file_upload leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-264529 was assigned to this vulnerability. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: Vendor was contacted early and confirmed immediately that the product is end-of-life. It should be retired and replaced.

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

Unrestricted file upload vulnerability in D-Link DAR-7000-40 appliance's /user/onlineuser.php script. The file_upload parameter lacks proper validation, allowing remote attackers to upload arbitrary files (including malicious executables). With CVSS 9.8 and remote attack vector, this allows complete system compromise.

MitigationSince D-Link DAR-7000-40 is end-of-life and receives no vendor support, the device must be retired and replaced with a supported solution. Temporary mitigations include network segmentation, WAF rules blocking /user/onlineuser.php, or restricting access to administrative interfaces.

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
Dar 7000 FirmwareOperating system
Affected:= v31r02b1413c

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

CVSS:3.1/AV:N/AC:L/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 the device model
    Access the device's web administration interface or check via SSH/telnet and look for the device model information (DAR-7000-40)
    Affected if The device is a D-Link DAR-7000-40 appliance
  2. Check the installed firmware version
    Navigate to the device's admin panel System Info or Status page, or use CLI command such as 'show version' or 'cat /proc/version' via SSH/telnet to retrieve the firmware version
    Affected if Firmware version is v31r02b1413c exactly
  3. Verify web interface accessibility
    Attempt to access the device's HTTP/HTTPS web interface from a browser or using curl http://[device-ip]/
    Affected if The administrative web interface is reachable (indicates the attack surface is exposed)
  4. Confirm the vulnerable script exists
    Check if the file /user/onlineuser.php is present by attempting to access http://[device-ip]/user/onlineuser.php
    Affected if The endpoint returns a valid response (200 OK or form) rather than a 404 error

You are affected if the device is a D-Link DAR-7000-40 with firmware version v31r02b1413c and the web interface with /user/onlineuser.php is accessible.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since D-Link DAR-7000-40 is end-of-life and receives no vendor support, the device must be retired and replaced with a supported solution. Temporary mitigations include network segmentation, WAF rules blocking /user/onlineuser.php, or restricting access to administrative interfaces.

Recommended fix High confidence
  1. Retire and replace the D-Link DAR-7000-40 device immediately as it is end-of-life with no security patches available.
  2. If immediate replacement is not possible, remove the device from the public internet and place it behind a strictly controlled firewall with no exposure to untrusted networks.
  3. Disable or restrict access to the /user/onlineuser.php endpoint if the device must remain in operation temporarily.
Caveat Product is end-of-life with no security updates; replacement with a currently supported device is required

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

Fix this in Dar 7000 Firmware Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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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-2024-4961 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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