CVE-2026-36816
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 · uneditedShenzhen Tenda Technology Co., Ltd Tenda W15E v15.11.0.10 was discovered to contain a buffer overflow in the wewifiWhiteUserInfo parameter of the formAddWewifiWhiteUser function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
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 confidenceA buffer overflow vulnerability exists in the Tenda W15E router firmware (v15.11.0.10) in the formAddWewifiWhiteUser function's wewifiWhiteUserInfo parameter. Attackers can exploit this via crafted HTTP requests to trigger a buffer overflow, causing device denial of service.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 Tenda W15E router modelCheck the device label, web admin interface status page, or SSH banner for the exact model number 'W15E'Affected if Device is not a Tenda W15E router, then not affected by this specific CVE
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Check firmware versionLog into the router web interface and navigate to System Status or Administration > Firmware Upgrade to view the installed version, or use 'cat /proc/version' or 'ver' command via UART/SSH if availableAffected if Firmware version is exactly 15.11.0.10 - other versions are not affected by this specific vulnerability
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Verify web management interface is enabledCheck router settings under Administration or System Management for HTTP/HTTPS management interface statusAffected if The web interface must be accessible - the vulnerability is exploited via crafted HTTP requests to the formAddWewifiWhiteUser function
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Confirm wewifi feature presenceLook for WiFi-related settings in the router web interface, typically under Wireless or WiFi settings sections - wewifi is a Tenda-specific WiFi management featureAffected if The wewifiWhiteUserInfo parameter only exists when the wewifi (white user) functionality is present in the firmware
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Identify exposed attack surfaceCheck if the router web interface is exposed to the network (LAN or WAN). Access the router at its IP address and attempt to locate the formAddWewifiWhiteUser endpoint or white user management pageAffected if The device is reachable via HTTP and the white user management feature is accessible, making the buffer overflow exploitable
The device is affected ONLY if it is a Tenda W15E router running firmware version 15.11.0.10 with the web interface and wewifi white user feature accessible to an attacker.
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 administrative web interface access to trusted networks or disable remote management to reduce attack surface.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-36816 — 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-2026-36816 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
- No weaponised exploit code, or anything meant to cause harm
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