Zyxel Zywall VPN 300 Firmware vulnerabilities

8 CVEs affecting Zyxel Zywall VPN 300 Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-34141, published 2023-07-17.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2023-33012, published 2023-07-17. High severity, CVSS 8.8. EPSS: 9.9% chance of exploitation in the next 30 days. 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 5.36 Patch 2, USG…
CVE-2018-9129, published 2018-08-15. Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days. ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.
CVE-2023-34139, published 2023-07-17. High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days. A command injection vulnerability in the Free Time WiFi hotspot feature of the Zyxel USG FLEX series firmware versions 4.50 through 5.36 Patch 2 and VPN series firmware versions 4.20 through 5.36…
CVE-2023-34141, published 2023-07-17. High severity, CVSS 8.0. EPSS: 0.7% chance of exploitation in the next 30 days. 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 versions 5.00 through 5.36…
CVE-2023-34138, published 2023-07-17. High severity, CVSS 8.0. EPSS: 0.7% chance of exploitation in the next 30 days. 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 through 5.36 Patch 2, …
CVE-2023-28767, published 2023-07-17. High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days. 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, USG FLEX 50(W)…
CVE-2023-33011, published 2023-07-17. High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days. 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) series firmware…
CVE-2023-34140, published 2023-07-17. Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days. 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 2, USG FLEX 50(W) series firmware…