CVE-2026-9389 Tenda F456 L7Im frmL7ImForm buffer overflow
Remote attackers can trigger a buffer overflow in the Tenda F456 router via the L7Im form, 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-2026-9389?
CVE-2026-9389 is a high-severity memory corruption vulnerability in Tenda F456, published on 24 May 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 F456 1.0.0.5. This affects the function frmL7ImForm of the file /goform/L7Im. The manipulation of the argument page leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used.
Which versions are affected by CVE-2026-9389?
How do I fix CVE-2026-9389?
No fix has been published for CVE-2026-9389 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-2026-9389 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9389 exists.
Sources
Also known as GHSA-65p4-www8-vqx4.