CVE-2026-11503 Tenda CX12L Wi-Fi Configuration Endpoint fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Wi-Fi configuration endpoint, 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-2026-11503?
CVE-2026-11503 is a high-severity memory corruption vulnerability in Tenda CX12L, published on 8 Jun 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 Tenda CX12L 16.03.53.12. The affected element is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set of the component Wi-Fi Configuration Endpoint. Such manipulation of the argument ssid leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-11503?
How do I fix CVE-2026-11503?
No fix has been published for CVE-2026-11503 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-2026-11503 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11503 exists.
Sources
Also known as GHSA-7qr5-4ph4-37p9.