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Stack-based Buffer OverflowWeakness · CWE-121

CVE-2024-53621

HIGH · 7.5 CVSS v3.1 Published 2025-06-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
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 buffer overflow in the formSetCfm() function of Tenda AC1206 1200M 11ac US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 allows attackers to cause a Denial of Service (DoS) via a crafted POST 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 confidence

A buffer overflow vulnerability exists in the formSetCfm() function of Tenda AC1206 router firmware V15.03.06.23. Attackers can send a crafted POST request to trigger the overflow, resulting in denial of service. The vulnerability resides in the web interface's form handling functionality.

MitigationApply vendor firmware update when available; until then, restrict access to the router's web management interface to trusted networks or disable remote administration.

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 checks

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

  1. Identify the router model
    Log into the router web interface or check the device label/menu to confirm the model is Tenda AC1206
    Affected if The device is NOT a Tenda AC1206 router
  2. Check the firmware version
    In the router web interface, navigate to System Settings or Administration > Firmware Upgrade to view the current firmware version. Compare it to V15.03.06.23
    Affected if The firmware version is V15.03.06.23
  3. Verify if the web management interface is accessible
    Attempt to access the router's IP address on ports 80 or 443 from the network. Check if the login page loads.
    Affected if The web interface is reachable and responds to HTTP/HTTPS requests
  4. Check if remote administration is enabled
    In the router web interface, go to Advanced Settings > Remote Management or similar. Look for options like 'Remote Management', 'Web Management', or 'Enable Remote Management'
    Affected if Remote administration is enabled and the web interface is accessible from external networks

You are affected if you own a Tenda AC1206 router running firmware version V15.03.06.23 and the router's web management interface is accessible (especially from untrusted networks).

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

Apply vendor firmware update when available; until then, restrict access to the router's web management interface to trusted networks or disable remote administration.

Have this fixed 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-2024-53621 in production — separate from our analysis above.

No notes yet

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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