CVE-2024-4241
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 was found in Tenda W9 1.0.0.7(4456). It has been declared as critical. This vulnerability affects the function formQosManageDouble_auto. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. The attack can be initiated remotely. The identifier of this vulnerability is VDB-262132. 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 confidenceStack-based buffer overflow in Tenda W9 router firmware 1.0.0.7(4456) in the formQosManageDouble_auto function. The ssidIndex parameter is not properly bounds-checked before being used in a copy operation to a stack-allocated buffer, allowing remote attackers to overflow the stack and potentially achieve remote code execution.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 router web interface or check device label/marketing to confirm it is a Tenda W9 routerAffected if Device is not a Tenda W9 router - this CVE does not apply
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Check firmware versionNavigate to router web management interface, go to System Settings or Administration section, look for firmware version information. Alternatively, check via CLI if telnet/ssh is enabled, or inspect firmware binary file if accessibleAffected if Firmware version is 1.0.0.7(4456) exactly - this is the affected version
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Verify web management interface is accessibleAttempt to access the router web interface via HTTP/HTTPS from LAN or WAN IP address. Check if ports 80 or 443 are listening and respondingAffected if Web interface is accessible from WAN (remote management enabled) - increases exposure to remote attack
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Confirm vulnerable function existsInspect firmware binary or network traffic for requests to /goform/formQosManageDouble_auto endpoint. This function handles QoS settings and accepts ssidIndex parameterAffected if The formQosManageDouble_auto function is present and responds to requests - vulnerability is present in this firmware version
You are affected if you have a Tenda W9 router running firmware version 1.0.0.7(4456) with the web management interface accessible (especially from WAN), as this specific version contains the stack-based buffer overflow in the formQosManageDouble_auto function when processing the ssidIndex parameter.
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 dataRestrict access to the router's web management interface from untrusted networks; disable remote WAN management if enabled. No vendor patch available—consider network segmentation or device replacement. If firmware modding is possible, add proper length validation on ssidIndex before the copy operation.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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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 sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-4241 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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