Edimax BR-6428NS 1.10 POST Request formWanTcpipSetup pppUserName buffer overflow

Summaryinfo

A vulnerability identified as critical has been detected in Edimax BR-6428NS 1.10. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. This vulnerability is identified as CVE-2026-9294. The attack can be initiated remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as critical, was found in Edimax BR-6428NS 1.10. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. The manipulation of the argument pppUserName with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at lavender-bicycle-a5a.notion.site. This vulnerability is uniquely identified as CVE-2026-9294. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at lavender-bicycle-a5a.notion.site. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31529). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Edimax

Name

• BR-6428NS

Version

• 1.10

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Threat Intelligenceinfo

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Entryinfo

Submitinfo

Accepted

• Submit #811533: EDIMAX BR-6428NS BR-6428NS_v4_1.10 Buffer Overflow (by wxhwxhwxh_tutu)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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