CVE-2026-19959 Edimax EW-7478APC formWanTcpipSetup stack-based overflow
Remote attackers can execute arbitrary code via a stack-based buffer overflow in the WAN TCP/IP setup form of Edimax access points.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19959?
CVE-2026-19959 is a critical memory corruption vulnerability in Edimax EW-7478APC, published on 16 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-19959?
How do I fix CVE-2026-19959?
No fix has been published for CVE-2026-19959 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-19959 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19959 exists.
Sources
Also known as GHSA-xfm9-p773-w7h2.