CVE-2026-9399 Edimax BR-6675nD POST Request formsetPPPoE buffer overflow
Remote attackers can trigger a buffer overflow in the PPPoE configuration handler of Edimax BR-6675nD 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-2026-9399?
CVE-2026-9399 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 was detected in Edimax BR-6675nD 1.12. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. It is possible to initiate the attack remotely. The exploit is now 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-2026-9399?
How do I fix CVE-2026-9399?
No fix has been published for CVE-2026-9399 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-2026-9399 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9399 exists.
Sources
Also known as GHSA-m37x-3837-x5f2.