dbcve.org
Dir 619l FirmwareOperating system · Dlink

CVE-2025-4450

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, was found in D-Link DIR-619L 2.04B04. Affected is the function formSetEasy_Wizard. The manipulation of the argument curTime leads to buffer overflow. It is possible to launch the attack 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

A buffer overflow vulnerability exists in D-Link DIR-619L firmware 2.04B04 within the formSetEasy_Wizard function. The vulnerability is triggered through manipulation of the curTime argument, allowing remote attackers to potentially execute arbitrary code. This is a critical-severity flaw (CVSS 9.8) affecting an end-of-life device.

MitigationSince the affected device is no longer supported by D-Link with security updates, the primary remediation is to replace the device with a currently supported model. If immediate replacement is not feasible, implement network segmentation to isolate the device and restrict remote access via firewall rules.

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. Check router firmware version
    Log into the D-Link DIR-619L web management interface and navigate to Status > Device Information, or use the command `grep version /var/firmware_info` if you have telnet/ssh access to the device.
    Affected if The firmware version displayed is exactly 2.04b04.
  2. Verify web interface is enabled
    Confirm that the router's HTTP/HTTPS management interface is enabled and accessible on the local network or remotely.
    Affected if The web management interface (which contains the vulnerable formSetEasy_Wizard function) is accessible.
  3. Check network exposure
    Determine if the router's management port (80/443) is exposed to untrusted networks. Review firewall rules or port forwarding configurations.
    Affected if The device's management interface is reachable from outside the local network or from untrusted hosts.
  4. Identify device model
    Verify the exact model number by checking the device label or the web interface Status page.
    Affected if The device is a D-Link DIR-619L hardware revision.

A user is affected if they are running D-Link DIR-619L firmware version 2.04b04 with the web management interface 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 the affected device is no longer supported by D-Link with security updates, the primary remediation is to replace the device with a currently supported model. If immediate replacement is not feasible, implement network segmentation to isolate the device and restrict remote access via firewall rules.

Recommended fix High confidence
  1. This vulnerability affects D-Link DIR-619L firmware 2.04b04, which is explicitly noted as a product no longer supported by the vendor.
  2. No vendor-provided firmware update, patch, or fix is available for this end-of-life device.
  3. Consider replacing the affected device with a currently supported model from D-Link or another vendor.
  4. If device replacement is not immediately possible, network-level mitigations such as restricting access to the router's web management interface to trusted IP addresses only may reduce attack surface.
  5. Disable remote web management (WAN access) if enabled, and only manage the device from trusted LAN segments.
Caveat Device is end-of-life with no firmware updates available; replacement with a supported device is the recommended path

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

Fix this in Dir 619l Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2025-4450 in production — separate from our analysis above.

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