CVE-2026-19959: Edimax Ew-7478apc

Critical severity, CVSS 9.9. EPSS: 0.8% chance of exploitation in the next 30 days.

A weakness has been identified in Edimax EW-7478APC 1.04. This affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup. This manipulation of the argument pppUserName causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Edimax Ew-7478apc: version 1.04 only

Published 2026-08-16. Last modified 2026-08-20.