Zyxel has fixed a dangerous vulnerability (CVE-2023-22920) in Zyxel 4G routers. A remote attacker could leverage this vulnerability to gain access to a vulnerable device. The vulnerability affects two models of 4G routers - LTE3202-M437, LTE3316-M604. Zyxel has released firmware updates for affected devices and recommends that users apply security updates.

Additional information about vulnerabilities and updates is available in Zyxel security advisory - zyxel.com.