Zyxel Usg20(w)-vpn Series Firmware
27 CVEs affecting Zyxel Usg20(w)-vpn Series Firmware. Latest disclosed: 2026-02-05. Critical: 0, High: 16.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2023-33012 | High | 8.8 | 2023-07-17 | A command injection vulnerability in the configuration parser of the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware ver… |
CVE-2023-33011 | High | 8.8 | 2023-07-17 | A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2… |
CVE-2023-28767 | High | 8.8 | 2023-07-17 | The configuration parser fails to sanitize user-controlled input in the Zyxel ATP series firmware versions 5.10 through 5.36, USG FLEX series firmware versions… |
CVE-2025-9133 | High | 8.1 | 2025-10-21 | 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 V5.4… |
CVE-2024-42057 | High | 8.1 | 2024-09-03 | 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 fr… |
CVE-2023-6764 | High | 8.1 | 2024-02-20 | 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… |
CVE-2023-34141 | High | 8.0 | 2023-07-17 | A command injection vulnerability in the access point (AP) management feature of the Zyxel ATP series firmware versions 5.00 through 5.36 Patch 2, USG FLEX ser… |
CVE-2023-34138 | High | 8.0 | 2023-07-17 | A command injection vulnerability in the hotspot management feature of the Zyxel ATP series firmware versions 4.60 through 5.36 Patch 2, USG FLEX series firmwa… |
CVE-2024-11667 | High | 7.5 | 2024-11-27 | A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware version… |
CVE-2024-42058 | High | 7.5 | 2024-09-03 | 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 V… |
CVE-2023-4398 | High | 7.5 | 2023-11-28 | 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 throu… |
CVE-2025-11730 | High | 7.2 | 2026-02-05 | A post‑authentication command injection vulnerability in the Dynamic DNS (DDNS) configuration CLI command in Zyxel ATP series firmware versions from V5.35 thro… |
CVE-2025-8078 | High | 7.2 | 2025-10-21 | 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… |
CVE-2024-42060 | High | 7.2 | 2024-09-03 | 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… |
CVE-2024-42059 | High | 7.2 | 2024-09-03 | 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… |
CVE-2023-6398 | High | 7.2 | 2024-02-20 | 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… |
CVE-2023-34140 | Medium | 6.5 | 2023-07-17 | A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.36 Patch 2, USG FLEX series firmware versions 4.50 through 5.36 Patch… |
CVE-2024-42061 | Medium | 6.1 | 2024-09-03 | A reflected cross-site scripting (XSS) vulnerability in the CGI program "dynamic_script.cgi" of Zyxel ATP series firmware versions from V4.32 through V5.38, US… |
CVE-2023-6399 | Medium | 5.7 | 2024-02-20 | 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 Pa… |
CVE-2023-5797 | Medium | 5.5 | 2023-11-28 | 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 v… |