CVE-2025-9133 – Zyxel ATP/USG FLEX/USG20(W) Missing Authorization Vulnerability

CVE ID : CVE-2025-9133

Published : Oct. 21, 2025, 1:57 a.m. | 45 minutes ago

Description : A missing authorization vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.40, USG FLEX series firmware versions from V4.50 through V5.40, USG FLEX 50(W) series firmware versions from V4.16 through V5.40, and USG20(W)-VPN series firmware versions from V4.16 through V5.40 could allow a semi-authenticated attacker—who has completed only the first stage of the two-factor authentication (2FA) process—to view and download the system configuration from an affected device.

Severity: 8.1 | HIGH

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