CVE-2023-40841
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 · uneditedTenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin is vulnerable to Buffer Overflow via function "add_white_node,"
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 AC6 router firmware (US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin) within the 'add_white_node' function. This function likely fails to perform proper bounds checking when handling input data related to whitelist node entries, allowing an attacker to overwrite adjacent memory and potentially achieve remote code execution.
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= 15.03.05.16CVSS 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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Confirm Tenda AC6 router modelAccess the router admin interface or check the device label to verify the model is Tenda AC6Affected if Device is not a Tenda AC6 router (not affected)
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Identify firmware versionLog into the router web interface, navigate to System Settings or Firmware Upgrade section, and record the firmware version displayed. Alternatively, check the firmware file name if you have access to the firmware binary (US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin)Affected if Firmware version is exactly 15.03.05.16 (vulnerable)
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Determine if add_white_node feature is accessibleAccess the router web interface and look for a whitelist or access control configuration section (often under Security or Access Control settings). The add_white_node function handles whitelist node entries.Affected if Whitelist management feature is exposed and accessible on the device (potential attack surface)
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Assess network exposure of management interfaceCheck if the router admin interface (typically on ports 80 or 443) is exposed to untrusted networks or the internet by reviewing portforwarding rules or firewall policiesAffected if Management interface is reachable from untrusted networks (exploitable remotely)
User is affected if they are running Tenda AC6 firmware version 15.03.05.16 and the whitelist management feature (add_white_node) is accessible on their network.
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 updates when available; if no patch exists, consider network segmentation, disabling the affected feature if possible, or replacing the device.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40841 — 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-2023-40841 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
- No weaponised exploit code, or anything meant to cause harm
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