CVE-2026-9401 Edimax BR-6675nD POST Request formWanTcpipSetup buffer overflow
Remote attackers can trigger a buffer overflow in the Edimax BR-6675nD router via the pppUserName parameter, potentially leading to code execution.
- 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-2026-9401?
CVE-2026-9401 is a high-severity memory corruption vulnerability in Edimax BR-6675nD, published on 24 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in Edimax BR-6675nD 1.12. Impacted is the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. The manipulation of the argument pppUserName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public 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-2026-9401?
How do I fix CVE-2026-9401?
No fix has been published for CVE-2026-9401 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-2026-9401 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9401 exists.
Sources
Also known as GHSA-54gg-frw3-mp2g.