CVE-2026-14818: Improper Limitation of a Pathname to a Restricted Directory

A path traversal vulnerability in the CLI command used to execute configuration files in Zyxel ATP series firmware versions from V4.32 through V5.42 Patch 1, USG FLEX series firmware versions from V4.50 through V5.42 Patch 1, USG FLEX 50W series firmware versions from V4.16 through V5.42 Patch 1,...

CVE-2025-11730: Improper Neutralization of Special Elements used in an OS Command

A post‑authentication command injection vulnerability in the Dynamic DNS DDNS configuration CLI command in Zyxel ATP series firmware versions from V5.35 through V5.41, USG FLEX series firmware versions from V5.35 through V5.41, USG FLEX 50W series firmware versions from V5.35 through V5.41, and...

PT-2025-42827

Name of the Vulnerable Software and Affected Versions Zyxel ATP series versions V4.32 through V5.40 Zyxel USG FLEX series versions V4.50 through V5.40 Zyxel USG FLEX 50W series versions V4.16 through V5.40 Zyxel USG20W-VPN series versions V4.16 through V5.40 Description A post-authentication...

CVE-2025-9133: Missing Authorization

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 50W series firmware versions from V4.16 through V5.40, and USG20W-VPN series firmware versions from V4.16 through V5.40 could...

CVE-2025-8078: Improper Neutralization of Special Elements used in an OS Command

A post-authentication command injection 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 50W series firmware versions from V4.16 through V5.40, and USG20W-VPN series firmware versions from V4.16...

PT-2025-51489

Уязвимость микропрограммного обеспечения сетевых устройств Zyxel ATP, USG FLEX и USG FLEX 50W/USG20W-VPN связана с отсутствием авторизации. Эксплуатация уязвимости может позволить нарушителю, действующему удалённо, оказать воздействие на конфиденциальность и целостность защищаемой информации...

CVE-2024-11667: Improper Limitation of a Pathname to a Restricted Directory

A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50W series firmware versions V5.10 through V5.38, and USG20W-VPN series firmware versions V5.10 through...

CVE-2024-42060

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN series firmware versions from V4.16...

CVE-2024-6343

A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN series firmware versions from V4.16 through...

CVE-2024-42061: Improper Neutralization of Input During Web Page Generation

A reflected cross-site scripting XSS vulnerability in the CGI program "dynamicscript.cgi" of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN seri...

CVE-2024-6343: Buffer Copy without Checking Size of Input

A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN series firmware versions from V4.16 through...

CVE-2024-42060: Improper Neutralization of Special Elements used in an OS Command

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN series firmware versions from V4.16...

CVE-2024-42059: Improper Neutralization of Special Elements used in an OS Command

A post-authentication command injection vulnerability in Zyxel ATP series firmware versions from V5.00 through V5.38, USG FLEX series firmware versions from V5.00 through V5.38, USG FLEX 50W series firmware versions from V5.00 through V5.38, and USG20W-VPN series firmware versions from V5.00...

CVE-2024-42058: NULL Pointer Dereference

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V5.20 through V5.38, and USG20W-VPN series firmware versions from V5.20 through V5.38 cou...

CVE-2024-42057: Improper Neutralization of Special Elements used in an OS Command

A command injection vulnerability in the IPSec VPN feature of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50W series firmware versions from V4.16 through V5.38, and USG20W-VPN series firmware versions from V4.16...

PT-2024-6029

Name of the Vulnerable Software and Affected Versions Zyxel ATP series versions V4.32 through V5.38 Zyxel USG FLEX series versions V4.50 through V5.38 Zyxel USG FLEX 50W series versions V5.20 through V5.38 Zyxel USG20W-VPN series versions V5.20 through V5.38 Description A null pointer dereference...

PT-2024-6027

Name of the Vulnerable Software and Affected Versions Zyxel ATP series versions V4.32 through V5.38 Zyxel USG FLEX series versions V4.50 through V5.38 Zyxel USG FLEX 50W series versions V4.16 through V5.38 Zyxel USG20W-VPN series versions V4.16 through V5.38 Description A buffer overflow...

CVE-2023-6399

A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN series firmware versions from 4.16 through 5.37...

CVE-2023-6398

CVE-2023-6398 is a post-authentication command-injection vulnerability in Zyxel devices where the file upload binary can be abused by an authenticated administrator to execute OS commands on the device via FTP. Affected products include ZyXEL ATP series (4.32–5.37 Patch 1), USG FLEX series (4.50–...

CVE-2023-6764: Use of Externally-Controlled Format String

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...