CVE-2025-9133

HIGH EPSS 91.7%
Published Oct 21, 20258mo ago · Modified Jun 17, 20261w ago
8.1 CVSS 3.1
High
Find Similar
Published Oct 21, 2025 8mo ago
Last Modified Jun 17, 2026 1w 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.

CVSS Details

Base Score
8.1
Exploitability
2.8
Impact
5.2
Vector string
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

Threat Intelligence

EPSS Exploit Probability
91.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 19

VendorProductVersionRange
zyxelzld*≥4.32  –  <5.41
zyxelatp100*any
zyxelatp100w*any
zyxelatp200*any
zyxelatp500*any
zyxelatp700*any
zyxelatp800*any
zyxelzld*≥4.50  –  <5.41
zyxelusg_flex_100*any
zyxelusg_flex_100ax*any
zyxelusg_flex_100w*any
zyxelusg_flex_200*any
zyxelusg_flex_50*any
zyxelusg_flex_500*any
zyxelusg_flex_50ax*any
zyxelusg_flex_700*any
zyxelzld*≥4.16  –  <5.41
zyxelusg_20w-vpn*any
zyxelusg_flex_50w*any

References 1

  • zyxel.com https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-command-injection-and-missing-authorization-vulnerabilities-in-zld-firewalls-10-21-2025
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.