CVE-2026-9403 Edimax BR-6675nD POST Request formWlSiteSurvey buffer overflow
Remote attackers can trigger a buffer overflow in the Edimax BR-6675nD router via a crafted POST request, 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-2026-9403?
CVE-2026-9403 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 determined in Edimax BR-6675nD 1.12. The impacted element is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component POST Request Handler. This manipulation of the argument selSSID causes buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-9403?
How do I fix CVE-2026-9403?
No fix has been published for CVE-2026-9403 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-2026-9403 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9403 exists.
Sources
Also known as GHSA-69c3-9259-5w7w.