dbcve.org
Dir 605l FirmwareOperating system · Dlink

CVE-2025-4441

CRITICAL · 9.8 CVSS v3.1 Published 2025-05-08
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 was found in D-Link DIR-605L 2.13B01. It has been classified as critical. This affects the function formSetWAN_Wizard534. The manipulation of the argument curTime leads to buffer overflow. It is possible to initiate 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 · high confidence

A buffer overflow vulnerability exists in D-Link DIR-605L firmware 2.13B01 within the formSetWAN_Wizard534 function. The overflow is triggered through manipulation of the curTime argument, allowing remote attackers to potentially execute arbitrary code. The vulnerability carries a CVSS 9.8 rating due to its network exploitability and critical impact.

MitigationSince D-Link DIR-605L is end-of-life and no longer receives security updates, the primary mitigation is to replace the affected device with a currently supported router model or consider alternative firmware such as OpenWrt if hardware capabilities permit.

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 605l FirmwareOperating system
Affected:= 2.13b01

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
    Check the device label on the router or access the web interface and look for the model number displayed on the login page or status page
    Affected if The device is not a D-Link DIR-605L - if different model, this CVE does not apply
  2. Check the firmware version
    Log into the router web interface, navigate to Status or System settings page, and locate the firmware version field. Alternatively, check the download file or release notes if you have access to the firmware image file
    Affected if The firmware version is 2.13B01 - this is the exact affected version
  3. Verify the web interface is accessible
    Attempt to access the router's web interface by entering the router's IP address in a web browser. The vulnerable function formSetWAN_Wizard534 is part of the web administration interface
    Affected if The web interface is accessible on the network - the vulnerability is in this web function
  4. Confirm WAN wizard feature exists
    The vulnerability is in the formSetWAN_Wizard534 function. Check if the WAN setup wizard feature is present in the web interface under WAN or Internet settings
    Affected if The WAN wizard functionality exists and is accessible - this is the vulnerable component

You are affected if you have a D-Link DIR-605L router running firmware version 2.13B01 and its web interface is accessible on your network.

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 DIR-605L is end-of-life and no longer receives security updates, the primary mitigation is to replace the affected device with a currently supported router model or consider alternative firmware such as OpenWrt if hardware capabilities permit.

Recommended fix High confidence
  1. The D-Link DIR-605L firmware version 2.13B01 is affected by a critical buffer overflow vulnerability (CVE-2025-4441, CVSS 9.8) in the formSetWAN_Wizard534 function.
  2. This product is end-of-life and no longer supported by D-Link according to the official vulnerability description.
  3. Replace the affected D-Link DIR-605L device with a currently supported router from D-Link or another manufacturer.
  4. If the device cannot be immediately replaced, place it behind a properly configured firewall and restrict network access to trusted users only to reduce attack surface.
  5. Monitor the device vendor for any future security advisories, though none are currently expected for this end-of-life product.
Caveat The DIR-605L is end-of-life with no firmware updates available; replacement with a currently supported device is required

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

Fix this in Dir 605l Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2025-4441 in production — separate from our analysis above.

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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
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