CVE-2026-12806 Edimax BR-6478AC V2 POST Request formWlSiteSurvey buffer overflow
Remote attackers can trigger a buffer overflow in the Edimax BR-6478AC V2 router via the formWlSiteSurvey handler, 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-2026-12806?
CVE-2026-12806 is a high-severity memory corruption vulnerability in Edimax BR-6478AC V2, published on 21 Jun 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-6478AC V2 1.23. The impacted element is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component POST Request Handler. The manipulation of the argument selSSID leads to buffer overflow. It is possible to initiate the attack 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-2026-12806?
How do I fix CVE-2026-12806?
No fix has been published for CVE-2026-12806 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-2026-12806 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12806 exists.
Sources
Also known as GHSA-93qv-48qr-mj84.