Reminder:
Please understand you are downloading beta firmware for immediately security patch. We urge all users upgrade to official release firmware when available.
Thanks for your interests.
Please read the Release Note carefully before updating firmware or installing software. Also, please be aware Zyxel is not responsible for damages if firmware, software, or other files are not installed according to the Release Note instructions. You can click to download the Release Note.
Notes to download the latest security gateway firmware:
We've made some changes to better serve you. Please log into your myZyxel account to obtain the latest firmware, ZLD4.25 for ZyWALL USG security gateway. Don't have an account yet? Sign up. Previous versions of firmware are still available on the Zyxel corporate website.
ZyWALL USG Series Firmware Upgrade Service Q&A