CVE-2026-24113
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 · uneditedAn issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by controlling the value of `nptr`. When this value is passed into the `getMibPrefix` function and concatenated using `sprintf` without proper size validation, it could lead to a buffer overflow vulnerability.
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 in Tenda W20E V4.0br_V15.11.0.6 where attacker-controlled 'nptr' parameter is passed to getMibPrefix function and concatenated via sprintf without bounds checking, allowing potential code execution or denial of service.
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= 15.11.0.6CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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 device modelAccess the device's web management interface or check the device label/sticker to confirm it is a Tenda W20E routerAffected if The device is not a Tenda W20E, then it is not affected by this specific CVE
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Check the firmware versionIn the Tenda W20E web interface, navigate to System Settings > Firmware Upgrade or Status page to view the installed firmware version. Alternatively, check the firmware file name or version string if you have access to the firmware binaryAffected if The firmware version is exactly 15.11.0.6, indicating the device is running the vulnerable version
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Determine if the web management interface is network-accessibleAttempt to access the device's IP address on HTTP port 80 from the network segment you are analyzing. Check if the login page for Tenda W20E is reachableAffected if The web management interface is exposed to an untrusted network, the vulnerability could be triggered by remote attackers sending a crafted 'nptr' parameter to the getMibPrefix function
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Inspect HTTP requests for the vulnerable parameterIf you have access to the device's HTTP traffic or can replay requests, look for any endpoint that accepts a parameter named 'nptr' and passes it to the getMibPrefix function. This typically occurs in SNMP or network diagnostic-related web formsAffected if The device processes user-supplied 'nptr' parameter through the getMibPrefix function without bounds checking, confirming active vulnerability
The device is affected only if it is a Tenda W20E running firmware version 15.11.0.6 with the web management interface accessible to the attacker, as the buffer overflow requires the vulnerable getMibPrefix function to process the 'nptr' parameter.
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; until then, restrict network access to the device's management interface to minimize attack surface.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-24113 — 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-2026-24113 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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