CVE-2026-4490 Tenda A18 Pro openSchedWifi setSchedWifi stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda A18 Pro router's scheduling function, 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-2026-4490?
CVE-2026-4490 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 flaw has been found in Tenda A18 Pro 02.03.02.28. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Which versions are affected by CVE-2026-4490?
How do I fix CVE-2026-4490?
No fix has been published for CVE-2026-4490 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-2026-4490 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4490 exists.
Sources
Also known as GHSA-94x9-2g6x-89qr.