CVE-2026-6199 Tenda F456 qossetting fromqossetting stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda F456 router's qossetting 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-2026-6199?
CVE-2026-6199 is a high-severity memory corruption vulnerability in Tenda F456, published on 13 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Tenda F456 1.0.0.5. Impacted is the function fromqossetting of the file /goform/qossetting. The manipulation of the argument page results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-6199?
How do I fix CVE-2026-6199?
No fix has been published for CVE-2026-6199 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-2026-6199 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6199 exists.
Sources
Also known as GHSA-8977-93px-wpcg.