Edimax BR-6428nC up to 1.16 /goform/setWAN pptpDfGateway  buffer overflow

Summaryinfo

A vulnerability was found in Edimax BR-6428nC up to 1.16. It has been rated as critical. Affected is an unknown function of the file /goform/setWAN. Performing a manipulation of the argument pptpDfGateway  results in buffer overflow. This vulnerability was named CVE-2026-7684. The attack may be initiated remotely. In addition, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Edimax BR-6428nC up to 1.16. It has been classified as critical. This affects an unknown function of the file /goform/setWAN. The manipulation of the argument pptpDfGateway  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.

It is possible to read the advisory at tzh00203.notion.site. This vulnerability is uniquely identified as CVE-2026-7684. 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 tzh00203.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-2026-26822). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Edimax

Name

• BR-6428nC

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16

CPE 2.3info

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• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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Submitinfo

Accepted

• Submit #801599: Edimax BR-6428nC v1.16 Buffer Overflow (by tian)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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