CVE-2025-9133

CWE-862 — Missing Authorization3 documents3 sources
Severity
8.1HIGH
EPSS
0.1%
top 82.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Zyxel ZLDZyxel ATP Series FirmwareZyxel Usg20(w)-vpn Series Firmware+2 more
Timeline
PublishedOct 21

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 vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NExploitability: 2.8 | Impact: 5.2

Affected Packages5 packages

▶CVEListV5zyxel/usg_flex_series_firmwareversions from V4.50 through V5.40
▶CVEListV5zyxel/usg_flex_50(w)_series_firmwareversions from V4.16 through V5.40
▶CVEListV5zyxel/usg20(w)-vpn_series_firmwareversions from V4.16 through V5.40
▶CVEListV5zyxel/atp_series_firmwareversions from V4.32 through V5.40
▶NVDzyxel/zld4.32 — 5.41+2

🔴Vulnerability Details

2
CVEList
CVE-2025-9133: A missing authorization vulnerability in Zyxel ATP series firmware versions from V4↗2025-10-21
▶
GHSA
GHSA-x59x-qc82-4w4p: A missing authorization vulnerability in Zyxel ATP series firmware versions from V4↗2025-10-21
▶