CVE-2023-40844
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 · uneditedTenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin is vulnerable to Buffer Overflow via function 'formWifiBasicSet.'
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 confidenceBuffer overflow vulnerability in the formWifiBasicSet function of Tenda AC6 router firmware US_AC6V1.0BR_V15.03.05.16 allows remote attackers to execute arbitrary code via crafted HTTP requests to the WiFi basic settings interface.
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= 15.03.05.16CVSS 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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Confirm device model is Tenda AC6Access the router web interface or check the device label/marketing material to verify the model is Tenda AC6Affected if Device is not a Tenda AC6 router, then it is not affected by this specific CVE
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Check installed firmware versionLog into the router web management interface and navigate to System Settings > Firmware Upgrade or similar, or use the router's administration page to view the firmware version. Compare against 15.03.05.16Affected if Firmware version is exactly 15.03.05.16; versions before or after this release are not affected by this specific vulnerability
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Verify web management interface is accessibleAttempt to access the router's HTTP/HTTPS web interface from a browser using the router's LAN IP (commonly 192.168.0.1) or WAN IP if remote management is enabledAffected if Web interface is accessible remotely over WAN, indicating the attack surface is exposed; even if affected firmware is running, local-only access reduces exploitability
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Check if WiFi basic settings page is reachableAttempt to access the WiFi basic settings page in the router web interface, typically under Wireless > Basic Settings, or observe if formWifiBasicSet endpoint respondsAffected if The WiFi basic settings interface is accessible and responds, confirming the vulnerable function is exposed
You are affected only if you have a Tenda AC6 router running exactly firmware version 15.03.05.16 with the web management interface accessible, enabling attackers to reach the vulnerable formWifiBasicSet function via crafted HTTP requests.
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 update if available; otherwise restrict web management interface access to trusted networks or disable remote management entirely as compensating control.
- Consultation4.0 h
- Implementation2.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,160.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40844 — 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-2023-40844 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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