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Ac1206 FirmwareOperating system · Tenda

CVE-2025-4298

CRITICAL · 9.8 CVSS v3.1 Published 2025-05-06
Fix available
A fix is available. Upgrade to after 15.03.06.23 or later.
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 was found in Tenda AC1206 up to 15.03.06.23. It has been declared as critical. This vulnerability affects the function formSetCfm of the file /goform/setcfm. The manipulation leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

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 confidence

A buffer overflow vulnerability exists in the formSetCfm function of the Tenda AC1206 router firmware (versions up to 15.03.06.23) in the /goform/setcfm web interface. The vulnerability allows remote attackers to overflow a buffer, potentially leading to arbitrary code execution or denial of service.

MitigationApply the latest Tenda firmware patch if available; otherwise restrict or disable the /goform/setcfm web interface through firewall rules or network segmentation, and consider replacing affected devices if no patch is forthcoming.

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
Ac1206 FirmwareOperating system
Affected:<= 15.03.06.23

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 the device model
    Access the router web administration interface and look for the device model name, or check the device label/case for 'AC1206' branding. Alternatively, check the DHCP vendor string or SNMP sysDescr if available remotely.
    Affected if The device is not a Tenda AC1206 router.
  2. Determine the firmware version
    In the router web interface, navigate to System Settings > Firmware Upgrade, or look for a 'System Info' or 'Status' page that displays the firmware version. The version number typically appears as something like '15.03.06.XX'.
    Affected if The firmware version is 15.03.06.23 or lower, or if the version cannot be determined but the device is an AC1206 model.
  3. Verify the web interface is accessible
    Attempt to access the router's web interface on the default IP (usually 192.168.0.1 or 192.168.1.1) via HTTP or HTTPS. Confirm the /goform/setcfm endpoint exists by checking if the page loads or responds.
    Affected if The router web interface is accessible on LAN or WAN interfaces.
  4. Check if remote management is enabled
    In the router web interface, look for 'Remote Management', 'Remote Access', or 'WAN Access' settings under Advanced or Security settings. Determine if the web interface is reachable from the WAN side.
    Affected if Remote management is enabled and the web interface is accessible from the WAN, increasing exposure to remote exploitation.
  5. Inspect network exposure
    Perform a port scan on the router's WAN IP address to check if HTTP (port 80) or HTTPS (port 443) is open to the internet. Use tools like nmap: nmap -p 80,443 <wan-ip>.
    Affected if Ports 80 or 443 are open to the internet on the router's WAN interface.

A user is affected if they own a Tenda AC1206 router running firmware version 15.03.06.23 or lower, and the /goform/setcfm web interface is accessible either locally or remotely.

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.

dbcve · scoped
Upgrade available Upgrade to a release after 15.03.06.23
Interim mitigation

Apply the latest Tenda firmware patch if available; otherwise restrict or disable the /goform/setcfm web interface through firewall rules or network segmentation, and consider replacing affected devices if no patch is forthcoming.

Recommended fix Moderate confidence

Latest firmware version available on Tenda's official website (version higher than 15.03.06.23)

  1. 1. Visit the official Tenda support page at www.tenda.com.cn and navigate to the AC1206 product support section.
  2. 2. Download the latest firmware version available for the AC1206 router.
  3. 3. Access the router's web management interface by entering the router's IP address in a web browser.
  4. 4. Navigate to the 'System Management' or 'Firmware Upgrade' section.
  5. 5. Upload the downloaded firmware file and initiate the upgrade process.
  6. 6. Wait for the upgrade to complete and the router to reboot.
  7. 7. After reboot, verify the firmware version in the router's admin panel to confirm the update was successful.
Caveat Review release notes for any configuration or feature changes that may require reconfiguration after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Ac1206 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2025-4298 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data