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Security Advisories

We care about your network security. It’s our highest priority, and it’s what drives us to deliver the timely, useful advice on emerging vulnerabilities that you’ll find below. But there are also a few practices that it’s good common sense to follow at all times:

  • Change the default password as soon as you log in to a new device for the first time
  • Use strong, unique passwords for every device and change them regularly
  • Ensure your devices are running the latest available firmware
  • Don't enable remote access unless it's absolutely necessary

Got a tipoff?

If you’ve found a vulnerability, we want to work with you to fix it.
Contact and we’ll get back to you.


Security update for Zyxel CPE devices and Small Business Gateways

Security advisory for the VPNFilter malware

Zyxel security advisory for reflected cross-site scripting vulnerability of ZyWALL/USG devices

Zyxel security advisory for CVE-2018-9149

Zyxel security advisory for Denial of Service on P-660HW v3

Zyxel security advisory for Meltdown and Spectre attacks

Zyxel security advisory for the recent botnet attacks targeting PK5001Z

Zyxel security advisory for the key management vulnerabilities of WPA2 protocol

Zyxel security advisory for dnsmasq vulnerabilities

Guard against Petya ransomware

Google Drive Backup ZyWALL USG Series Firmware Upgrade Service Q&A

Zyxel statement to vulnerability CVE-2017-3216

Guard against WannaCry ransomware

Zyxel statement to the recent WordPress attacks

Zyxel statement regarding unauthenticated remote command execution vulnerability

Zyxel advisory: password change recommendations to maximize protection

Zyxel statement for the TR-064 protocol implementation in CPEs

Zyxel advisory for the BlackNurse attack

Zyxel Brute force attacks? Zyxel to tighten protection on routers and CPE

Zyxel Advisory for Vulnerability CVE-2015-7547

Zyxel to Fix SSH Private Key and Certificate Vulnerability

Zyxel to Issue Fix for CERT VU#870744 Vulnerabilities

Zyxel to Issue Fix for LTE3301-Q222 Software Bug

Zyxel Not Affected by “RSA-CRT Key Leaks”

Zyxel Product Support for Microsoft Windows 10

Google Drive Function Now Restored and Available on Zyxel Network Storage Products

Avoid CSRF Pharming Vulnerability and MOOSE Malware

Zyxel to Release Patch for KCodes NetUSB Vulnerability

Google Drive Backup Function Temporarily Unavailable on Zyxel Network Storage Products

Zyxel USG/ZyWALL Series Not Affected by “FREAK”

Guard Against “GHOST” Vulnerability

Guard Against “Misfortune Cookie” Vulnerability

Protect Your Network from the SSL v3.0 “POODLE” Vulnerability

Shellshock!? Is it an Issue for Zyxel Products?

About WPS Attack by Brute Force

End User License Agreement

Zyxel Windows 8 Support