US
Product
USG20(W)-VPN series firmware
On CISA KEVExploited in the wildRansomware-linked
28
CVEs
1
On KEV
9.8
Max CVSS
0
New 30D
Severity mix
Critical 1High 16Medium 11Low 0
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Add USG20(W)-VPN series firmware to your stack to get only the CVEs that touch what you run.
| CVE | CVSS | Published | Summary · affected versions |
|---|---|---|---|
| CVE-2023-33012 | 8.8 | Jul 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 versions 5.00 through… Affected: 5.10 through 5.36 Patch 2 |
| CVE-2023-33011 | 8.8 | Jul 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, USG FLEX 50(W)… Affected: 5.10 through 5.36 Patch 2 |
| CVE-2023-28767 | 8.8 | Jul 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 5.00 through 5.36, … Affected: 5.10 through 5.36 |
| CVE-2025-9133 | 8.1 | Oct 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 V5.40, USG FLEX 50(W)… Affected: versions from V4.16 through V5.40 |
| CVE-2024-42057 | 8.1 | Sep 3 | 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… Affected: versions V4.16 through V5.38 |
| CVE-2023-6764 | 8.1 | Feb 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 series firmware versions from… Affected: version 4.16 through 5.37 Patch 1 |
| CVE-2023-34141 | 8.0 | Jul 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 series firmware… Affected: 5.00 through 5.36 Patch 2 |
| CVE-2023-34138 | 8.0 | Jul 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 firmware versions 4.60… Affected: 4.60 through 5.36 Patch 2 |
| CVE-2024-42058 | 7.5 | Sep 3 | 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 50(W)… Affected: versions V5.20 through V5.38 |
| CVE-2023-4398 | 7.5 | Nov 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 through 5.37, USG FLEX… Affected: versions 4.16 through 5.37 |
| CVE-2026-14818 | 7.2 | Aug 4 | 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… Affected: from V4.16 through V5.42 Patch 1 |
| CVE-2025-11730 | 7.2 | Feb 5 | 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… Affected: versions from V5.35 through V5.41 |
| CVE-2025-8078 | 7.2 | Oct 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 V4.50 through V5.40,… Affected: versions from V4.16 through V5.40 |
| CVE-2024-42060 | 7.2 | Sep 3 | 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,… Affected: versions V4.16 through V5.38 |
| CVE-2024-42059 | 7.2 | Sep 3 | 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,… Affected: versions V5.00 through V5.38 |
| CVE-2023-6398 | 7.2 | Feb 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 series firmware… Affected: version 4.16 through 5.37 Patch 1 |
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