dbcve.org
Dir 619l FirmwareOperating system · Dlink

CVE-2025-4449

CRITICAL · 9.8 CVSS v3.1 Published 2025-05-09
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
A vulnerability, which was classified as critical, has been found in D-Link DIR-619L 2.04B04. This issue affects the function formEasySetupWizard3. The manipulation of the argument wan_connected leads to buffer overflow. The attack may be initiated remotely. The vendor was contacted early about this disclosure. This vulnerability only affects products that are no longer supported by the maintainer.

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

Buffer overflow vulnerability in D-Link DIR-619L firmware 2.04B04 in the formEasySetupWizard3 function via the wan_connected parameter allows remote attackers to potentially execute arbitrary code due to insufficient bounds checking.

MitigationSince the affected device is end-of-life with no vendor support, replace with a currently supported router or implement network segmentation/firewall controls to limit remote attack surface.

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
Dir 619l FirmwareOperating system
Affected:= 2.04b04

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 router's web admin interface or check the device label/menu to confirm the model is D-Link DIR-619L
    Affected if The device is NOT a D-Link DIR-619L (this vulnerability only affects that specific model)
  2. Check the firmware version
    Log into the router's web admin interface and navigate to Status or System Settings to view the firmware version, or use the router's upgrade/check page
    Affected if The firmware version is exactly 2.04B04 (this is the only affected version)
  3. Verify the web interface is accessible
    Attempt to access the router's web admin interface via its LAN IP address (typically 192.168.0.1) in a web browser
    Affected if The web interface is accessible and the formEasySetupWizard3 function is present (vulnerability exists in this web component)
  4. Confirm the wan_connected parameter handling
    Inspect HTTP requests to the router's web interface or review the web server configuration for the formEasySetupWizard3 function handling the wan_connected parameter
    Affected if The wan_connected parameter can be submitted to formEasySetupWizard3 without proper bounds validation

The device is affected only if it is a D-Link DIR-619L router running firmware version 2.04B04 with the web interface accessible and the formEasySetupWizard3 function handling the wan_connected parameter.

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 the affected device is end-of-life with no vendor support, replace with a currently supported router or implement network segmentation/firewall controls to limit remote attack surface.

Recommended fix Moderate confidence
  1. This vulnerability affects D-Link DIR-619L firmware 2.04b04, which is explicitly stated as a product no longer supported by the vendor.
  2. No vendor patch is available for this End-of-Life device.
  3. No fixed firmware version is specified in the vulnerability disclosure.
  4. Consider replacing the affected device with a currently supported model from D-Link or another vendor.
  5. If replacement is not immediately possible, place the device behind a firewall and restrict network access to trusted users only.
Caveat Device is End-of-Life with no security support; replacement is the only recommended remediation path

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

Fix this in Dir 619l Firmware Scoped from the published advisory
  • Consultation6.0 h
  • Implementation16.0 h
  • Testing4.0 h
  • Review / QA2.0 h
28.0 hours of engineering $5,040
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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-2025-4449 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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