Description
Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.
Recommended action
Apply updates per vendor instructions.
CISA remediation due date for U.S. federal agencies: 21 Jun 2023.
Collected automatically from public sources. Verify affected versions and fixes in the vendor's notice before acting.