The vulnerability of the sub_421A04() function in TOTOLINK A7000R router microprogramming software allows a intruder to trigger a service failure.

The vulnerability of sub421A04 in the microprogramming software of TOTOLINK A7000R routers is related to buffer overflow in the stack. Exploiting this vulnerability can allow an attacker to cause a service failure...

TOTOLINK A7000R sub_421A04 function stack buffer overflow vulnerability

TOTOLINK A7000R is a wireless router from China's Gion Electronics TOTOLINK that supports WiFi7 technology for home or small business network environments. The TOTOLINK A7000R suffers from a stack buffer overflow vulnerability, which stems from the failure of the wifiOff parameter in the sub421A0...

CVE-2025-63462

The Totolink A7000R wireless router, specifically version v9.1.0u.6115_B20201022 , is susceptible to a stack-based buffer overflow vulnerability. The root cause is the failure of the wifiOff parameter within the sub_421A04 function to properly validate the length of the input data. An attacker ca...