CVE-2025-4832
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 has been found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615 and classified as critical. This vulnerability affects unknown code of the file /boafrm/formDosCfg 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 · high confidenceBuffer overflow vulnerability in TOTOLINK routers (A702R, A3002R, A3002RU) firmware 3.0.0-B20230809.1615 in the /boafrm/formDosCfg HTTP POST handler. The submit-url parameter is not properly bounds-checked, allowing remote attackers to overflow a buffer via crafted HTTP POST requests.
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 admin web interface or check the device label to confirm the exact model number is A702R, A3002R, or A3002RUAffected if Model is not one of A702R, A3002R, or A3002RU then not affected
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Check firmware versionLog into the router web interface and navigate to System Status or Firmware Upgrade page to view the installed firmware version, or use telnet/ssh to run 'cat /proc/version' or check /etc/version file if accessibleAffected if Firmware version is exactly 3.0.0-B20230809.1615 then affected; other versions are not affected by this specific CVE
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Verify web interface is accessibleAttempt to reach the router HTTP/HTTPS management interface from a client device using the router's LAN IP address (typically 192.168.0.1 or 192.168.1.1)Affected if Web administration interface is accessible on the network then the vulnerable endpoint could be reached; if interface is disabled or blocked then exploitation is not possible
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Confirm vulnerable endpoint existsSend an HTTP POST request to /boafrm/formDosCfg endpoint with a crafted submit-url parameter exceeding normal length, or check if the endpoint responds (requires network access to the router)Affected if The /boafrm/formDosCfg handler responds to requests then the buffer overflow vulnerability is present
Device is affected only if it is a TOTOLINK A702R, A3002R, or A3002RU router running firmware version exactly 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 update if available; otherwise disable the web interface or restrict administrative access to trusted IPs only via firewall rules.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-4832 — 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-2025-4832 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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