CVE-2026-4489 Tenda A18 Pro fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda A18 Pro router's WiFi settings interface, potentially leading to arbitrary 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-2026-4489?
CVE-2026-4489 is a high-severity memory corruption vulnerability in Tenda A18 Pro, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in Tenda A18 Pro 02.03.02.28. This vulnerability affects the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. The manipulation results in stack-based buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-4489?
How do I fix CVE-2026-4489?
No fix has been published for CVE-2026-4489 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-2026-4489 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4489 exists.
Sources
Also known as GHSA-4cqh-m7pg-qhqj.