CVE-2025-4825
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. This vulnerability affects unknown code of the file /boafrm/formDMZ of the component HTTP POST Request Handler. The manipulation of the argument submit-url 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 confidenceBuffer overflow vulnerability in TOTOLINK router web interface (formDMZ function) allows remote attackers to overflow the submit-url argument via crafted HTTP POST requests to /boafrm/formDMZ. This affects A702R, A3002R, and A3002RU models running firmware version 3.0.0-B20230809.1615.
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 router modelAccess the router web interface or check the device label/metadata to confirm the exact model number (A702R, A3002R, or A3002RU).Affected if Model is A702R, A3002R, or A3002RU.
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Check firmware versionLog into the router web interface and navigate to the firmware version or status page. Alternatively, check via CLI if accessible or inspect the firmware file if extracted from a firmware update.Affected if Firmware version is exactly 3.0.0-B20230809.1615.
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Verify web interface is enabledAttempt to access the router web interface at the default gateway IP address using HTTP or HTTPS. Confirm the interface is reachable and responds.Affected if The router web interface is accessible from the network.
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Confirm formDMZ endpoint existsSend a GET or POST request to /boafrm/formDMZ and observe if the endpoint responds (even with an error). This confirms the vulnerable function is present in the web server.Affected if The /boafrm/formDMZ endpoint is reachable and processes requests.
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Check if remote management is exposedDetermine if the web interface is accessible from WAN (external) networks. This may require checking the router firewall settings, port forwarding, or attempting to access the public IP on ports 80/443.Affected if The router web interface is accessible from WAN/external networks.
You are affected if you own a TOTOLINK A702R, A3002R, or A3002RU router running firmware version 3.0.0-B20230809.1615 with the web interface and formDMZ endpoint exposed.
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, disable remote web management, implement network segmentation, and consider WAF/IPS rules to block malformed requests to the formDMZ endpoint.
- Consultation6.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $9,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4825 — 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-2025-4825 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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