Detections
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Zyxel USG FLEX H Series Firewall < 1.32 Privilege Escalation

medium Nessus Plugin ID 237022

Synopsis

The remote security gateway is affected by multiple privilege escalation vulnerabilities.

Description

Firmware version of the Zyxel USG is less than uOS 1.32. This means the Zyxel device is vulnerable to a privilege escalation vulnerability. The improper privilege management vulnerability in the recovery function of certain USG FLEX H series uOS firmware versions could allow an authenticated local attacker with administrator privileges to upload a crafted configuration file and escalate privileges on a vulnerable device.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Zyxel USG uOS 1.32 or later.

See Also

http://www.nessus.org/u?a10e5b38

Plugin Details

Severity: Medium

ID: 237022

File Name: zyxel_usg_cve-2025-1732.nasl

Version: 1.1

Type: local

Family: Firewalls

Published: 5/21/2025

Updated: 5/21/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Vector: CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2025-1732

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/h:zyxel:usg_flex

Required KB Items: installed_sw/Zyxel Unified Security Gateway (USG)

Patch Publication Date: 4/22/2025

Vulnerability Publication Date: 4/22/2025

Reference Information

CVE: CVE-2025-1732

IAVA: 2025-A-0295