CVE-2026-9443 Edimax BR-6478AC POST Request formL2TPSetup buffer overflow
Remote attackers can trigger a buffer overflow in the L2TP setup handler of Edimax BR-6478AC routers, potentially leading to code execution or service disruption.
- 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-2026-9443?
CVE-2026-9443 is a high-severity memory corruption vulnerability in Edimax BR-6478AC, published on 25 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-9443?
How do I fix CVE-2026-9443?
No fix has been published for CVE-2026-9443 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-2026-9443 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9443 exists.
Sources
Also known as GHSA-349r-6q9h-2pfh.