CVE-2026-36805
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 G0 v15.11.0.5 was discovered to contain multiple buffer overflows in the Saveqqlist function via the qqStr and markStr parameters. These vulnerabilities allow 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 confidenceBuffer overflow vulnerabilities in the Saveqqlist function of Tenda G0 router firmware v15.11.0.5 allow remote attackers to cause Denial of Service via specially crafted HTTP requests containing oversized qqStr and markStr parameters. The vulnerability stems from insufficient bounds checking when processing these string inputs.
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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Identify the device modelAccess the router's web interface or check the device label to confirm it is a Tenda G0 routerAffected if The device is NOT a Tenda G0 router (not affected)
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Check the firmware versionLog into the router web interface and navigate to System Settings or Status page to view the firmware version, or use the command 'cat /proc/version' if you have shell accessAffected if The firmware version is NOT 15.11.0.5 (not affected)
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Verify the Saveqqlist function existsSend an HTTP GET request to the router's web interface and look for the Saveqqlist function in the firmware binary or web interface paths (e.g., check if /goform/Saveqqlist is accessible)Affected if The Saveqqlist function does not exist on the device (not affected)
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Confirm HTTP parameter handling is enabledAttempt a benign HTTP POST request to the Saveqqlist endpoint with test values for qqStr and markStr parameters to see if the function accepts and processes themAffected if The router rejects or does not process these parameters (not affected)
The device is affected if it is a Tenda G0 router running firmware version 15.11.0.5 with the Saveqqlist function accessible via the web interface.
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; if no patch exists, restrict network access to the device's management interface or implement input validation at an upstream firewall to block abnormally long qqStr/markStr values.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-36805 — 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-2026-36805 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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