dbcve.org
G3 FirmwareOperating system · Tenda

CVE-2024-4165

CRITICAL · 9.8 CVSS v3.1 Published 2024-04-25
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
A vulnerability, which was classified as critical, was found in Tenda G3 15.11.0.17(9502). Affected is the function modifyDhcpRule of the file /goform/modifyDhcpRule. The manipulation of the argument bindDhcpIndex leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-261984. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

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 confidence

Stack-based buffer overflow in Tenda G3 router firmware 15.11.0.17 allows remote code execution via the `bindDhcpIndex` parameter in the /goform/modifyDhcpRule web interface function. The vulnerability is remotely exploitable without authentication and a public exploit exists, enabling full compromise of the affected device.

MitigationIsolate the affected device on a restricted network segment and consider replacement, as Tenda has not responded to the disclosure and no vendor patch is available. A WAF or intrusion prevention system may filter exploitation attempts targeting the web interface.

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
G3 FirmwareOperating system
Affected:= 15.11.0.17\(9502\)_cn

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
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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify device model
    Access the router web interface or check the device label to confirm it is a Tenda G3 router. Alternatively, inspect the HTTP Server header or check the admin login page for Tenda G3 branding.
    Affected if The device is not a Tenda G3 router.
  2. Check firmware version
    Log into the router web interface and navigate to the System Status or Firmware Version page. Alternatively, use the Tenda admin panel or check the firmware file if you have access to the firmware image.
    Affected if The firmware version is exactly 15.11.0.17 (9502)_cn.
  3. Verify web interface is accessible
    Attempt to access the router web interface by navigating to the router IP address (commonly 192.168.0.1 or 192.168.1.1) in a web browser. Confirm the /goform/modifyDhcpRule endpoint responds to HTTP requests.
    Affected if The web interface is not exposed or the /goform/modifyDhcpRule endpoint does not exist.
  4. Check network exposure of the web interface
    Determine if the router web interface is accessible from the public internet or an untrusted network segment. Use an external IP scan or review firewall rules to see if ports 80 or 443 are open to untrusted interfaces.
    Affected if The router web interface is exposed to the internet or untrusted networks without firewall protection.
  5. Inspect the vulnerable parameter availability
    Send an HTTP POST request to /goform/modifyDhcpRule with the bindDhcpIndex parameter. This requires the DHCP configuration feature to be present in the web interface.
    Affected if The modifyDhcpRule function with bindDhcpIndex parameter is not present or the DHCP configuration feature is disabled.

You are affected if you have a Tenda G3 router running firmware version 15.11.0.17 (9502)_cn with the web interface accessible and the modifyDhcpRule function available.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Isolate the affected device on a restricted network segment and consider replacement, as Tenda has not responded to the disclosure and no vendor patch is available. A WAF or intrusion prevention system may filter exploitation attempts targeting the web interface.

Fix this in G3 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,970
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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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-4165 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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