CVE-2026-105778 Tenda AC5 Wifi setWifi stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda AC5 router's WiFi handler, 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-2026-105778?
CVE-2026-105778 is a critical memory corruption vulnerability in Tenda AC5, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in Tenda AC5 02.03.01.111_multi. Affected by this issue is some unknown functionality of the file /goform/setWifi of the component Wifi Handler. Such manipulation of the argument wifiPwd leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2026-105778?
How do I fix CVE-2026-105778?
No fix has been published for CVE-2026-105778 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-2026-105778 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105778 exists.
Sources
Also known as GHSA-pmv4-xrcq-cmxf.