CVE-2026-10123
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 was found in TRENDnet TEW-432BRP 3.10B20. This impacts the function formSetDomainFilter of the file /goform/formSetDomainFilter. Performing a manipulation of the argument blocked_domain/permitted_domain/blocked_domain_list/permitted_domain_list results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor explains: "This product has been EOL for 15 years (since 2009). As the item has been EOL for such a long time, we are not able to replicate or fix any vulnerabilities." This vulnerability only affects products that are no longer supported by the maintainer.
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 TRENDnet TEW-432BRP router's web interface. The formSetDomainFilter function in /goform/formSetDomainFilter fails to properly validate input length for domain filter parameters (blocked_domain, permitted_domain, blocked_domain_list, permitted_domain_list), allowing remote attackers to overflow the stack buffer via specially crafted HTTP requests with excessively long domain strings.
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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Identify the device modelAccess the router's web administration interface (typically at 192.168.1.1) and check the status or system information page for the exact model number, or physically inspect the device labelAffected if Device is not a TRENDnet TEW-432BRP (different models are not affected by this specific CVE)
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Confirm firmware versionIn the router's web interface, navigate to the Administration or System section to view the firmware version informationAffected if Firmware version is unknown or cannot be verified - the device is EOL since 2009 and may still be running vulnerable code
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Verify web interface accessibilityAttempt to access the router's web login page on the local network (port 80/http)Affected if Web interface is exposed to untrusted networks - the vulnerability is exploitable via the web form
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Check if domain filtering is enabledIn the router's web interface, navigate to the Domain Filter or Access Control settings and determine whether any domain filtering rules are configured (blocked_domain, permitted_domain, blocked_domain_list, or permitted_domain_list parameters)Affected if Domain filtering feature is actively configured with domain lists - the overflow occurs when these parameters are manipulated
You are affected if you are running a TRENDnet TEW-432BRP device with its web interface accessible and the domain filtering feature is enabled or configurable.
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 dataNo vendor patch available (EOL product since 2009). Implement compensating controls: disable remote web management, isolate device behind firewall, or replace with a supported device.
- Consultation4.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-10123 — 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-2026-10123 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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