TOTOLINK EX300_V2 V4.0.3c.7484 was discovered to contain a command injection vulnerability via the langType parameter in the setLanguageCfg function. This vulnerability is exploitable via a crafted MQTT data packet.
https://github.com/winmt/my-vuls/tree/main/TOTOLINK%20EX300_V2
https://github.com/winmt/CVE/blob/main/TOTOLINK%20EX300_V2/README.md