Input validation

An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37, and...

CVE-2023-5960

CVE-2023-5960 describes an improper privilege management vulnerability in Zyxel USG FLEX firewall and VPN series firmware. Affected products: USG FLEX firmware 4.50–5.37 and VPN firmware 4.30–5.37. Root cause: hotspot feature allows an authenticated local attacker to access system files on the de...

CVE-2023-5960

An improper privilege management vulnerability in the hotspot feature of the Zyxel USG FLEX series firmware versions 4.50 through 5.37 and VPN series firmware versions 4.30 through 5.37 could allow an authenticated local attacker to access the system files on an affected device...

CVE-2023-5797

CVE-2023-5797 describes an improper privilege management vulnerability in the debug CLI command of Zyxel devices. Affected products include Zyxel ATP series (4.32–5.37), USG FLEX series (4.50–5.37), USG FLEX 50(W) (4.16–5.37), USG20(W)-VPN (4.16–5.37), VPN series (4.30–5.37), NWA50AX (6.29 ABYW.2...

CVE-2023-5797

An improper privilege management vulnerability in the debug CLI command of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37,...

CVE-2023-5797

An improper privilege management vulnerability in the debug CLI command of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37,...

CVE-2023-5650

An improper privilege management vulnerability in the ZySH of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37, and VPN seri...

CVE-2023-5650

CVE-2023-5650 describes an improper privilege management vulnerability in Zyxel ZySH that affects Zyxel ATP, USG FLEX (including 50(W)), USG20(W)-VPN, and VPN series firmware. A authenticated local attacker could exploit ZySH to modify the URL of the registration page in the device web GUI, enabl...

CVE-2023-4398

An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series...

CVE-2023-4397

A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50W series firmware version 5.37, and USG20W-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause...

CVE-2023-4397

The CVE-2023-4397 issue is a buffer overflow in Zyxel ATP/USG firmware (5.37 primarily) that can be triggered by an authenticated local attacker with administrator privileges via crafted CLI strings, leading to DoS. Affected: Zyxel ATP series, USG FLEX series, USG FLEX 50(W), USG20(W)-VPN; root c...

CVE-2023-37926

The CVE-2023-37926 issue affects Zyxel devices including ATP series 4.32–5.37, USG FLEX series 4.50–5.37, USG FLEX 50(W) 4.16–5.37, USG20(W)-VPN 4.16–5.37, and VPN series 4.30–5.37. It is a buffer overflow in firmware that enables an authenticated local attacker to cause denial-of-service by runn...

CVE-2023-37925

CVE-2023-37925 describes an improper privilege management vulnerability in the debug CLI command on Zyxel devices (ATP series 4.32–5.37; USG FLEX series 4.50–5.37; USG FLEX 50(W) 4.16–5.37; USG20(W)-VPN 4.16–5.37; VPN 4.30–5.37; NWA50AX 6.29(ABYW.2); WAC500 6.65(ABVS.1); WAX300H 6.60(ACHF.1); WBE...

CVE-2023-37925

An improper privilege management vulnerability in the debug CLI command of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37,...

CVE-2023-35139

A cross-site scripting XSS vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50W series firmware versions 5.10 through 5.37, USG20W-VPN series firmware versions 5.10 through 5.37, and VPN...

CVE-2023-35139

Summary of CVE-2023-35139 : A cross-site scripting (XSS) vulnerability exists in the CGI program of Zyxel ATP series (5.10–5.37), USG FLEX series (5.00–5.37), USG FLEX 50(W) (5.10–5.37), USG20(W)-VPN (5.10–5.37), and VPN series (5.00–5.37). An unauthenticated LAN-based attacker could store malici...

CVE-2023-35136

CVE-2023-35136 describes an improper input validation vulnerability in the Quagga package across Zyxel devices (ATP series 4.32–5.37; USG FLEX 4.50–5.37; USG FLEX 50(W) 4.16–5.37; USG20(W)-VPN 4.16–5.37; VPN series 4.30–5.37) that could allow an authenticated local attacker to access configuratio...

CVE-2023-35136

An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50W series firmware versions 4.16 through 5.37, USG20W-VPN series firmware versions 4.16 through 5.37, and...

Zyxel USG FLEX Security Vulnerability

Zyxel USG FLEX is a firewall from China Hopkins Zyxel. Offering flexible VPN options IPsec, SSL or L2TP, it provides flexible and secure remote access for remote work and management. A security vulnerability exists in Zyxel USG FLEX series firmware versions 4.50 to 5.37, VPN series firmware...

Zyxel ATP Input Validation Error Vulnerability

Zyxel ATP is a firewall from China-based Heqin Zyxel. The Zyxel ATP suffers from an input validation error vulnerability that stems from an incorrect input validation vulnerability in the Quagga program package, which allows an authenticated, local attacker to access configuration files on the...