Zyxel USG FLEX H Series Firewall < 1.30 Privilege Escalation

high Nessus Plugin ID 237023

Synopsis

The remote security gateway is affected by a privilege escalation vulnerability.

Description

Firmware version of the Zyxel USG is less than uOS 1.30. This means the Zyxel device is vulnerable to a privilege escalation vulnerability. The insufficiently protected credentials vulnerability in the CLI command of the USG FLEX H series firewalls could allow an authenticated local attacker to gain privilege escalation by stealing the authentication token of a login administrator. Note that this attack could be successful only if the administrator has not logged out.

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 1.30 or later.

Plugin Details

Severity: High

ID: 237023

File Name: zyxel_usg_cve-2024-9677.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: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

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

CVSS Score Source: CVE-2024-9677

CVSS v3

Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: 10/21/2024

Vulnerability Publication Date: 10/21/2024

Reference Information

CVE: CVE-2024-9677

IAVA: 2024-A-0684-S

Detections

Analytics