CVE-2026-3804 Tenda i3 WifiMacFilterSet formWifiMacFilterSet stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the Tenda i3 router's Wi-Fi MAC filter interface, 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-2026-3804?
CVE-2026-3804 is a high-severity memory corruption vulnerability in Tenda i3, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet. The manipulation of the argument index results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Which versions are affected by CVE-2026-3804?
It affects 1 product.
Products include Tenda I3 Firmware.
How do I fix CVE-2026-3804?
No fix has been published for CVE-2026-3804 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-2026-3804 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3804 exists.
Other vulnerabilities in Tenda i3
- CVE-2026-3970 Tenda i3 wifiSSIDget formwrlSSIDget stack-based overflow
- CVE-2026-3971 Tenda i3 wifiSSIDset formwrlSSIDset stack-based overflow
- CVE-2026-3799 Tenda i3 setcfm formSetCfm stack-based overflow
- CVE-2026-3801 Tenda i3 setAutoPing formSetAutoPing stack-based overflow
- CVE-2026-3802 Tenda i3 exeCommand formexeCommand stack-based overflow
Sources
Also known as GHSA-gcmm-29vw-qxj6.