Zyxel security advisory (AV26-725)

Serial number: AV26-725
Date: July 21, 2026

On July 21, 2026, Zyxel published a security advisory to address a vulnerability in the following products:

• DSL/Ethernet CPE – multiple versions and models
• Fiber ONTs – multiple versions and models
• Wireless Extenders – multiple versions and models

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• Zyxel security advisory for post-authentication command injection vulnerability in certain DSL/Ethernet CPE, Fiber ONTs, and Wireless Extenders
• Zyxel Advisories