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


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



Zyxel security advisory for CGI vulnerability of LTE

Zyxel security advisory for DNSpooq

Zyxel security advisory for remote code execution and denial-of-service vulnerabilities of CPE

Zyxel security advisory for a new variant of Gafgyt malware

Zyxel security advisory for P1302-T10D v3 modem insecure direct object reference vulnerability

Zyxel security advisory for the new Mirai malware variant targeting P660HN devices

Reinforcing router security: German BSI’s Secure Broadband Router guideline

Zyxel security advisory for BCMUPnP_Hunter botnet

Zyxel security advisory for IKEv1 protocol vulnerability

Zyxel security advisory for the Linux kernel TCP flaw

Security update for Zyxel CPE devices and Small Business Gateways

Security advisory for the VPNFilter malware

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 dnsmasq vulnerabilities

Zyxel statement to vulnerability CVE-2017-3216

Zyxel advisory: password change recommendations to maximize protection

Zyxel statement for the TR-064 protocol implementation in CPEs

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

Guard against “Misfortune Cookie” vulnerability

Shellshock!? Is it an issue for Zyxel products?

WPS brute force attack

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