CVE-2025-9133

published 2025-10-21

CVE-2025-9133: 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…

Priority P2 61 high 8.1 CVSS 3.1

AV N AC L PR L UI N S U C H I H A N

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
zyxel	atp_series_firmware	—	—
zyxel	usg20_vpn_series_firmware	—	—
zyxel	usg_flex_50_series_firmware	—	—
zyxel	usg_flex_series_firmware	—	—
zyxel	zld	>= 4.16 < 5.41	5.41
zyxel	zld	>= 4.32 < 5.41	5.41
zyxel	zld	>= 4.50 < 5.41	5.41

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