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...

CVE-2025-8078

CVE-2025-8078 describes a post-authentication command-injection vulnerability in Zyxel devices: Zyxel ATP series firmware v4.32–v5.40, USG FLEX series v4.50–v5.40, USG FLEX 50(W) series v4.16–v5.40, and USG20(W)-VPN series v4.16–v5.40. An authenticated administrator can pass a crafted string as a...

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...

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-2024-42059: 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-2024-42057: 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...

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-2024-6343: 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-2024-42061: 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...

The vulnerability of the File Transfer Protocol (FTP) implementation in the microprogrammed networking devices of ZyXEL USG FLEX, USG FLEX 50(W)/USG20(W)-VPN, USG FLEX H, and ATP allows a perpetrator to execute arbitrary commands.

The vulnerability of the File Transfer Protocol FTP implementation in microprogrammed network devices such as ZyXEL USG FLEX, USG FLEX 50W/USG20W-VPN, USG FLEX H, and ATP lies in the lack of measures to neutralize special elements used in operating system commands during the loading of binary...

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-2023-6398: Improper Neutralization of Special Elements used in an OS Command

A post-authentication command injection vulnerability in the file upload binary 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...

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...

CVE-2023-6399: Use of Externally-Controlled Format String

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...