CVE-2023-34139

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

A command injection vulnerability in the Free Time WiFi hotspot feature of the Zyxel USG FLEX series firmware versions 4.50 through 5.36 Patch 2 and VPN series firmware versions 4.20 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands on an affected device.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-78

Affected software

Vendor	Product	Versions
Zyxel	USG FLEX series firmware	4.50 through 5.36 Patch 2
Zyxel	VPN series firmware	4.20 through 5.36 Patch 2
zyxel	usg_flex_firmware	>= 4.50, <= 5.36_Patch-2
zyxel	vpn_firmware	>= 4.20, <= 5.36_Patch-2

References

Timeline

Published: Jul 17, 2023
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2023

CVE-2023-34146.5A cross-site request forgery vulnerability exists in versions of the Jenkins Plug-in for ServiceNow DevOps prior to 1.38.1 that, if exploite CVE-2023-341406.5A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 CVE-2023-341418.0A command injection vulnerability in the access point (AP) management feature of the Zyxel ATP series firmware versions 5.00 through 5.36 Pa CVE-2023-341427.5Cleartext Transmission of Sensitive Information vulnerability in Hitachi Device Manager on Windows, Linux (Device Manager Server, Device Man CVE-2023-341438.1Improper Validation of Certificate with Host Mismatch vulnerability in Hitachi Device Manager on Windows, Linux (Device Manager Server, Devi CVE-2023-341447.8An untrusted search path vulnerability in the Trend Micro Apex One and Apex One as a Service security agent could allow a local attacker to CVE-2023-341457.8An untrusted search path vulnerability in the Trend Micro Apex One and Apex One as a Service security agent could allow a local attacker to CVE-2023-341467.8An exposed dangerous function vulnerability in the Trend Micro Apex One and Apex One as a Service security agent could allow a local attacke CVE-2023-341477.8An exposed dangerous function vulnerability in the Trend Micro Apex One and Apex One as a Service security agent could allow a local attacke CVE-2023-341487.8An exposed dangerous function vulnerability in the Trend Micro Apex One and Apex One as a Service security agent could allow a local attacke CVE-2023-341496.5Allocation of Resources Without Limits or Throttling vulnerability in Apache Software Foundation Apache Struts.This issue affects Apache Str CVE-2023-341505.3** UNSUPPORTED WHEN ASSIGNED ** Use of TikaEncodingDetector in Apache Any23 can cause excessive memory usage.