Shellshock!? Is it an issue for Zyxel products?

Zyxel security advisory for buffer overflow and post-authentication command injection vulnerabilities in some 4G LTE/5G NR CPE, DSL/Ethernet CPE, fiber ONTs, and Wi-Fi extenders

Zyxel security advisory for command injection and buffer overflow vulnerabilities of CPE, fiber ONTs, and Wi-Fi extenders

Zyxel security advisory for FragAttacks against Wi-Fi products

Zyxel security advisory for DNSpooq