CVE-2026-9443: Edimax BR-6478AC POST Request formL2TPSetup buffer overflow

Published May 25, 2026

Updated

A security vulnerability has been detected in Edimax BR-6478AC 1.23. This vulnerability affects the function formL2TPSetup of the file /goform/formL2TPSetup of the component POST Request Handler. The manipulation of the argument L2TPUserName leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected Software

1 affected component

Edimax BR-6478AC=1.23

Event History

May 25, 2026

CVE Published

via MITRE·08:45 AM

Data Sourced

via MITRE·08:45 AM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-9443?

The severity of CVE-2026-9443 is high, rated at 8.8.

How do I fix CVE-2026-9443?

To fix CVE-2026-9443, update the Edimax BR-6478AC firmware to the latest version provided by the manufacturer.

What type of vulnerability is CVE-2026-9443?

CVE-2026-9443 is a buffer overflow vulnerability.

What component is affected by CVE-2026-9443?

CVE-2026-9443 affects the POST Request Handler, specifically the formL2TPSetup function.

What could happen if CVE-2026-9443 is exploited?

Exploitation of CVE-2026-9443 could allow an attacker to remotely execute code due to the buffer overflow.

Company

Resources

Contact

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