CVE-2026-3803: Tenda i3 Firmware

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. The manipulation of the argument index leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Affected products

• Tenda i3 Firmware: version 1.0.0.6(2204) only

Published 2026-03-09. Last modified 2026-06-17.