CVE-2025-4343
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 · uneditedA vulnerability has been found in D-Link DIR-600L up to 2.07B01 and classified as critical. This vulnerability affects the function formEasySetupWizard. The manipulation of the argument host leads to buffer overflow. The attack can be initiated remotely. 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 confidenceA buffer overflow vulnerability exists in the D-Link DIR-600L router firmware (versions up to 2.07B01) within the formEasySetupWizard function. The vulnerability is triggered through manipulation of the host argument, allowing remote attackers to potentially execute arbitrary code due to improper bounds checking.
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<= 2.07b01CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelAccess the router's web management interface and check the device information page, or look at the physical device label to confirm the model is D-Link DIR-600LAffected if The device is a D-Link DIR-600L router
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Check the installed firmware versionLog into the router web interface and navigate to the Status or System section to view the firmware version, or check the version string via the device's administration pageAffected if The firmware version is 2.07b01 or any version lower than 2.07b01 (i.e., <= 2.07b01)
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Verify the web management interface is accessibleAttempt to access the router's web interface by entering the router's IP address in a web browser (typically 192.168.0.1)Affected if The web management interface responds and is reachable on the network
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Confirm the vulnerable function is presentThe vulnerability exists in the formEasySetupWizard function which handles the host argument; this is a built-in function of the firmware and cannot be disabled separatelyAffected if The device is running the affected firmware version (2.07b01 or lower)
You are affected if you have a D-Link DIR-600L router running firmware version 2.07b01 or lower, and its web management interface is network-accessible.
Generated from the published advisory. Verify against your own configuration.
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 · scopedSince D-Link no longer supports the DIR-600L, the recommended remediation is to replace the end-of-life device with a currently supported router model and ensure proper network segmentation if the device must remain in service temporarily.
- Replace the D-Link DIR-600L router with a currently supported model, as this device is end-of-life and no longer receives security updates from the vendor.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-4343 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-4343 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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