CVE-2026-9440
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 identified in Edimax BR-6478AC 1.23. Affected by this vulnerability is the function formAccept of the file /goform/formAccept of the component POST Request Handler. Such manipulation of the argument submit-url leads to command injection. It is possible to launch the attack remotely. The exploit is publicly available and might be used. 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 · moderate confidenceCommand injection vulnerability in Edimax BR-6478AC v1.23 router web interface. The formAccept handler at /goform/formAccept fails to sanitize the submit-url parameter before using it in a system command, allowing remote attackers to execute arbitrary commands via crafted POST requests.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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's web interface or check the device label to confirm the model is Edimax BR-6478ACAffected if The device is not an Edimax BR-6478AC router - this vulnerability only applies to this specific model
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Check the firmware versionLog into the router web interface and navigate to the system status or firmware upgrade page to view the installed firmware version; compare against 1.23Affected if Firmware version is 1.23 - this is the only version listed as affected in the CVE summary
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Verify the vulnerable endpoint existsAttempt to access the URI /goform/formAccept via HTTP POST request (this requires authentication to the router web interface)Affected if The endpoint responds - indicates the vulnerable form handler is present on the device
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Assess web interface accessibilityDetermine if the router's web management interface is accessible from untrusted networks by checking router access settings or by attempting remote access from an external networkAffected if The web interface is exposed to untrusted/remotely accessible networks, enabling remote attackers to reach the vulnerable form
You are affected if you have an Edimax BR-6478AC router running firmware version 1.23 with its web management interface accessible to untrusted networks, as this combination allows remote attackers to reach the vulnerable /goform/formAccept 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 dataSince Edimax has not responded to vulnerability reports and no patch is available, mitigate by restricting the device's web management interface to trusted networks only, or consider replacing the device if it is end-of-life.
- Consultation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9440 — 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-2026-9440 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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