CVE-2024-0538
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 Tenda W9 1.0.0.7(4456) and classified as critical. This vulnerability affects the function formQosManage_auto of the component httpd. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-250708. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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 confidenceA stack-based buffer overflow vulnerability exists in the httpd web server of Tenda W9 router firmware 1.0.0.7(4456). The formQosManage_auto function fails to properly validate the ssidIndex argument before using it in a buffer operation, allowing remote attackers to potentially overwrite stack memory and execute arbitrary code.
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= 1.0.0.7\(4456\)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 checksWork through these to decide whether this CVE applies to you.
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Identify device modelAccess the router's web admin panel and check the device model information, typically found in System Settings or Status pageAffected if Device is NOT a Tenda W9 router (not affected)
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Check firmware versionIn the router's web admin panel, navigate to System Settings or Firmware Upgrade page to find the installed firmware versionAffected if Firmware version is NOT 1.0.0.7(4456) (not affected)
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Verify httpd service is runningAttempt to access the router's web interface on the standard HTTP port (typically 80) to confirm the httpd service is activeAffected if httpd service is not running or web interface is inaccessible (not affected)
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Confirm QoS management feature availabilityLog into the router admin panel and check if QoS (Quality of Service) settings or bandwidth management features are present and accessibleAffected if QoS management feature is not available or not exposed in the web interface (not affected)
The environment is affected only if the device is a Tenda W9 router running firmware version 1.0.0.7(4456) with the httpd web server running and the QoS management feature 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.
From vendor dataSince the vendor has not responded to the disclosure, organizations should restrict network access to the device's web interface, disable the httpd service if possible, or replace the device with a supported alternative until an official firmware patch becomes available.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-0538 — 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-2024-0538 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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