CVE-2026-6136
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 security vulnerability has been detected in Tenda F451 1.0.0.7_cn_svn7958. Impacted is the function frmL7ImForm of the file /goform/L7Im. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
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 F451 router firmware (version 1.0.0.7_cn_svn7958) in the frmL7ImForm function within /goform/L7Im. The 'page' parameter is not properly bounds-checked before use in a stack-allocated buffer, allowing remote attackers to overflow the buffer and potentially execute arbitrary code.
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= 1.0.0.7CVSS 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 Tenda F451 router on the networkAccess the router's web administration interface or check device labeling/model number. Confirm the model is Tenda F451.Affected if The device is a Tenda F451 router
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Check installed firmware versionLog into the router web interface and navigate to System Settings > Firmware Upgrade, or check the version displayed on the status/dashboard page. Alternatively, check via CLI if telnet/ssh is enabled.Affected if Firmware version is 1.0.0.7
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Verify the vulnerable /goform/L7Im endpoint existsSend an HTTP GET or POST request to http://<router-ip>/goform/L7Im. A valid response (even an error page) indicates the endpoint is present.Affected if The /goform/L7Im endpoint is reachable and responds to requests
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Confirm web management interface is exposedCheck if router's HTTP (port 80) or HTTPS (port 443) interface is accessible from untrusted networks. Use a port scanner or attempt access from an external IP.Affected if The router's web interface (port 80/443) is accessible from outside trusted internal networks
You are affected if you have a Tenda F451 router running firmware version 1.0.0.7 with the /goform/L7Im endpoint accessible, particularly from untrusted networks.
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 when available. As an interim control, restrict access to the router's web management interface (port 80/443) to trusted internal IPs only using firewall rules, as exploitation is remote and publicly documented.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-6136 — 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-2026-6136 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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