CVE-2026-51846
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 · uneditedIn Tenda AC7 v15.03.06.44, the wanSpeed parameter of the route /goform/AdvSetMacMtuWan has a stack buffer overflow vulnerability that can lead to remote arbitrary code execution.
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 buffer overflow in the wanSpeed parameter of the /goform/AdvSetMacMtuWan endpoint in Tenda AC7 firmware v15.03.06.44 allows attackers to overwrite stack memory and achieve remote arbitrary 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= 15.03.06.44CVSS 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 AC7Access the router web interface or check device labeling. The AC7 is a Tenda WiFi router with model number clearly marked on the device.Affected if Device is not a Tenda AC7 router, then not affected by this specific CVE.
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Check firmware version is 15.03.06.44Log into the router web management interface and navigate to System Settings or Firmware version information page. The version number is typically displayed under 'Firmware Version' or 'System Version'. Alternatively, some Tenda routers expose version via the /goform/getSysInfo endpoint.Affected if Firmware version is exactly 15.03.06.44 - this is the only affected version for this CVE.
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Verify web management interface is accessibleAttempt to access the router web interface on the default IP (commonly 192.168.0.1 or 192.168.1.1). The vulnerable endpoint is /goform/AdvSetMacMtuWan.Affected if Web interface is not accessible from your location (either locally or remotely), but note that if the interface IS accessible and the version matches, the device is vulnerable.
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Identify if the AdvSetMacMtuWan endpoint existsSend an HTTP GET or POST request to http://[router-ip]/goform/AdvSetMacMtuWan. A valid response (even an error) indicates the endpoint exists.Affected if The endpoint responds (indicating the vulnerable web form handler is present), combined with version 15.03.06.44, confirms the device is affected.
Device is affected only if it is a Tenda AC7 router running firmware version exactly 15.03.06.44 and the web management interface with the AdvSetMacMtuWan endpoint is 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 dataApply vendor firmware update when available; until then, restrict access to the device's web management interface to trusted networks or disable remote administration.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-51846 — 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-2026-51846 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
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