CVE-2025-4829
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 · uneditedA vulnerability classified as critical was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. Affected by this vulnerability is the function sub_40BE30 of the file /boafrm/formStats of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be launched 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 confidenceBuffer overflow vulnerability in TOTOLINK A702R, A3002R, and A3002RU routers (firmware 3.0.0-B20230809.1615) in the HTTP POST request handler for the formStats function. The 'submit-url' argument is not properly bounds-checked, allowing an attacker to overflow a buffer and potentially execute arbitrary code remotely.
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= 3.0.0-b20230809.1615= 3.0.0-b20230809.1615= 3.0.0-b20230809.1615CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 router modelAccess the router's web management interface and check the device information page, or check the device label/markings for the model number (A702R, A3002R, or A3002RU)Affected if The model is Totolink A702R, A3002R, or A3002RU
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Check the installed firmware versionLog into the router web interface and navigate to System Status or Firmware Upgrade page to view the current firmware version, or use the router's command interface if available to retrieve the firmware versionAffected if The firmware version is exactly 3.0.0-B20230809.1615
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Verify web management interface accessibilityAttempt to access the router's HTTP/HTTPS web interface from the network. Check if port 80 or 443 is open and respondingAffected if The router's web management interface is accessible from a network where an attacker could send HTTP POST requests
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Confirm the formStats function is presentSend an HTTP POST request to the router's web interface endpoint (typically /cgi-bin/cstecgi.cgi or similar) with a formStats action and inspect if the endpoint accepts the requestAffected if The formStats function endpoint accepts HTTP POST requests and the 'submit-url' parameter can be manipulated
The device is affected if it is a Totolink A702R, A3002R, or A3002RU running firmware version 3.0.0-B20230809.1615 with the web management interface accessible on the 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 patch if available; otherwise restrict or disable access to the device's web management interface via network segmentation or firewall rules to limit attack surface.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4829 — 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-2025-4829 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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