CVE-2024-40416
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 in /goform/SetVirtualServerCfg in the sub_6320C function in Tenda AX1806 1.0.0.1 firmware leads to stack-based buffer overflow.
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 the Tenda AX1806 router firmware 1.0.0.1, specifically in the /goform/SetVirtualServerCfg endpoint handled by function sub_6320C. The vulnerability allows remote attackers to overflow a stack-allocated buffer, likely due to missing bounds checking on user input, potentially enabling arbitrary code execution with elevated privileges.
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= 1.0.0.1CVSS 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 router modelAccess the router web interface or check the device label/marketing packaging to confirm the model is Tenda AX1806Affected if The device is not a Tenda AX1806 router - different models are not affected by this specific CVE
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Check the firmware versionLog into the router web management interface, navigate to System Settings or Administration section, and locate the firmware version information. Alternatively, check via telnet/SSH if enabled, or examine the firmware binary file if extracted from an update.Affected if The installed firmware version is exactly 1.0.0.1 - other versions (including newer patched versions or older versions) have different affected status
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Verify the web management interface is accessibleAttempt to access the router's web interface from a browser using the router's IP address (typically 192.168.0.1 or 192.168.1.1). Check if HTTP/HTTPS ports 80 or 443 are open on the router's WAN interface by scanning the public IP or testing from an external location.Affected if The web management interface is exposed to untrusted networks (WAN) - the vulnerability is remotely exploitable, so exposure to the internet or untrusted LAN segments increases risk
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Check for virtual server configuration accessIn the router web interface, navigate to Advanced Settings or Port Forwarding/Virtual Server section. Attempt to access or modify the SetVirtualServerCfg endpoint functionality, which handles virtual server/port forwarding rules.Affected if The virtual server or port forwarding feature is configured and accessible through the web interface - the vulnerable function sub_6320C processes this specific endpoint's input
A user is affected if they have a Tenda AX1806 router running firmware version 1.0.0.1 with the web management interface accessible (especially from WAN), as this combination allows remote exploitation of the buffer overflow in the SetVirtualServerCfg endpoint.
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 dataApply vendor firmware patch if available; otherwise restrict access to the router's web management interface from untrusted networks and consider network segmentation as a compensating control until patched.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-40416 — 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-2024-40416 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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