Question 1

What is the EOL Risk Score for Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN?

Accepted Answer

Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN has an EOL Risk Score™ of 30 out of 100, placing it in the Medium risk band. The score is calculated from four factors: EOL Recency (0/40), Attack Surface (10/30), CISA KEV Exposure (20/20), and Extended Support Availability (0/10).

Question 2

Is Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN still supported?

Accepted Answer

Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN is currently supported. End of life is scheduled for June 30, 2030. Plan your migration before that date to avoid security risk.

Question 3

When does Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN reach end of life?

Accepted Answer

Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN reached (or will reach) end of life on June 30, 2030. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN after end of life?

Accepted Answer

After end of life, Zyxel ATP/USG FLEX/USG/ZyWALL/VPN USG20-VPN no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.