CVE-2026-10123
Deferred Deferred - Pending Action
Stack-Based Buffer Overflow in TRENDnet TEW-432BRP

Publication date: 2026-05-30

Last updated on: 2026-06-01

Assigner: VulDB

Description
A 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.
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Meta Information
Published
2026-05-30
Last Modified
2026-06-01
Generated
2026-06-19
AI Q&A
2026-05-30
EPSS Evaluated
2026-06-18
NVD
CVE-2026-10123
EUVD
EUVD-2026-33465
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
trendnet tew-432brp 3.10b20
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

CVE-2026-10123 is a stack-based buffer overflow vulnerability found in the TRENDnet TEW-432BRP router, specifically in the formSetDomainFilter function accessed via /goform/formSetDomainFilter.

The issue arises because user input is copied directly into a local stack variable without proper validation. An attacker can exploit this by sending a specially crafted long string to parameters like blocked_domain_list, which overwrites the function's return address.

This can cause the router to crash and become unresponsive, disrupting its normal operation. The vulnerability can be triggered remotely.

Detection Guidance

This vulnerability can be detected by sending a specially crafted POST request to the /goform/formSetDomainFilter endpoint of the TRENDnet TEW-432BRP router. Specifically, sending a long string (such as a series of 'a' characters) to the blocked_domain_list parameter can trigger the buffer overflow and cause the router to crash or become unresponsive.

A detection command example using curl would be:

  • curl -X POST http://[router_ip]/goform/formSetDomainFilter -d "blocked_domain_list=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

If the router crashes or becomes unresponsive after this request, it indicates the presence of the vulnerability.

Mitigation Strategies

Since the affected product TRENDnet TEW-432BRP has been end-of-life for 15 years and the vendor does not provide fixes, immediate mitigation steps include:

  • Remove or isolate the vulnerable device from the network to prevent remote exploitation.
  • Disable remote management or restrict access to the device's management interface to trusted hosts only.
  • Consider replacing the device with a supported and updated model to ensure ongoing security.
Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Impact Analysis

Exploiting this vulnerability can cause the affected TRENDnet router to crash and stop functioning properly, leading to denial of service.

Since the router becomes unresponsive, network services relying on it may be disrupted, potentially affecting connectivity and security.

Because the exploit is publicly available, attackers could remotely initiate this attack, increasing the risk.

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