CVE-2026-13564 | Edimax EW-7478APC 1.04 POST Request /goform/formPPPoESetup pppUserName stack-based overflow

A vulnerability, which was classified as critical, has been found in Edimax EW-7478APC 1.04. Affected is the function formPPPoESetup of the file /goform/formPPPoESetup of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in stack-based buffer overflow.

This vulnerability is identified as CVE-2026-13564. 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.