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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected products
- Zyxel / ATP series firmwareversions from V4.32 through V5.40 – versions from V4.32 through V5.40
- Zyxel / USG20(W)-VPN series firmwareversions from V4.16 through V5.40 – versions from V4.16 through V5.40
- Zyxel / USG FLEX 50(W) series firmwareversions from V4.16 through V5.40 – versions from V4.16 through V5.40
- Zyxel / USG FLEX series firmwareversions from V4.50 through V5.40 – versions from V4.50 through V5.40