CVE-2026-11524
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 has been found in Tenda W20E 15.11.0.6. Impacted is the function modifyWifiFilterRules of the file /goform/modifyWifiFilterRules of the component Web Management Interface. The manipulation of the argument wifiFilterListRemark leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public 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 W20E router's web management interface (version 15.11.0.6). The vulnerability exists in the /goform/modifyWifiFilterRules endpoint where the wifiFilterListRemark parameter is not properly bounds-checked before being copied to a stack-allocated buffer. Remote attackers can exploit this to execute arbitrary code by sending specially crafted HTTP 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
- 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 the router modelAccess the router's web管理界面 or check the device label to confirm it is a Tenda W20E deviceAffected if The device is not a Tenda W20E router, then this CVE does not apply
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Check the installed firmware versionLog into the router's web管理界面 and navigate to System Settings > Firmware Upgrade, or use the command 'cat /proc/version' via telnet/SSH if available, to determine the firmware versionAffected if The firmware version is 15.11.0.6, indicating this specific affected version
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Verify the web management interface is enabledAttempt to access the router's web管理界面 on the default HTTP port (typically 80) at the router's IP addressAffected if The web interface is accessible on the network, enabling potential remote exploitation of the vulnerability
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Confirm the modifyWifiFilterRules endpoint existsSend a GET or POST request to http://[router-ip]/goform/modifyWifiFilterRules and observe the responseAffected if The endpoint responds (rather than returning a 404), indicating the vulnerable function is present on the device
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Check for unusual network exposureReview the router's firewall or access control settings to determine if the web管理界面 is exposed to untrusted networks or the public internetAffected if The web management interface is accessible from untrusted networks, increasing the likelihood of remote exploitation
A user is affected if they own a Tenda W20E router running firmware version 15.11.0.6 with the web management interface accessible, as the stack-based buffer overflow in the wifiFilterListRemark parameter of the /goform/modifyWifiFilterRules endpoint can then be exploited remotely.
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 dataRestrict access to the router's web management interface from untrusted networks; if available, apply vendor firmware updates. Until a patch is released, network segmentation and blocking external access to the management interface are the primary mitigations.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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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-2026-11524 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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