CVE-2026-6194
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 weakness has been identified in Totolink A3002MU B20211125.1046. Affected by this vulnerability is the function sub_410188 of the file /boafrm/formWlanSetup of the component HTTP Request Handler. This manipulation of the argument wan-url causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
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 confidenceStack-based buffer overflow in the HTTP Request Handler for the formWlanSetup function in Totolink A3002MU router firmware. The wan-url parameter passed to sub_410188 is not properly bounds-checked before use, allowing an attacker to overflow a stack buffer via specially crafted HTTP requests and potentially execute arbitrary code.
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
- 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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Confirm device model is Totolink A3002MUAccess the router web interface or check the device label/marketing materials to verify the exact model numberAffected if Device is a Totolink A3002MU router
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Identify installed firmware versionLog into the router web management interface and navigate to System Status or Firmware Upgrade page to view the current firmware version; alternatively, check via UART/SSH if availableAffected if Firmware version has not been updated to include the fix for this overflow vulnerability
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Verify HTTP web management interface is accessibleAttempt to access the router via HTTP (typically http://192.168.0.1 or similar default gateway IP) on ports 80 or 443Affected if The web interface is exposed and reachable (the vulnerable formWlanSetup function handles HTTP requests)
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Check if wireless configuration (formWlanSetup) is accessibleNavigate to the wireless setup page in the router web interface - typically labeled as WLAN, Wireless, or Wi-Fi settingsAffected if The formWlanSetup function is available and processes the wan-url parameter without bounds checking
You are affected if you have a Totolink A3002MU device with an unpatched firmware version where the HTTP web management interface is accessible and exposes the wireless configuration functions that process the wan-url parameter.
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 when available; otherwise disable or restrict remote web management interface access and place device behind a firewall to reduce attack surface.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-6194 — 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-2026-6194 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
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