CVE-2025-9133
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | zyxel |
| Product | atp series firmware |
| Published | Oct 21, 2025 |
| Last Updated | Feb 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Zyxel / ATP series firmware
versions from V4.32 through V5.40
Zyxel / USG FLEX series firmware
versions from V4.50 through V5.40
Zyxel / USG FLEX 50(W) series firmware
versions from V4.16 through V5.40
Zyxel / USG20(W)-VPN series firmware
versions from V4.16 through V5.40