Zyxel NXC5500 Firmware vulnerabilities

4 CVEs affecting Zyxel NXC5500 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-2022-26531, published 2022-05-24. High severity, CVSS 7.8. EPSS: 6.2% chance of exploitation in the next 30 days. Multiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP…
CVE-2022-26532, published 2022-05-24. High severity, CVSS 7.8. EPSS: 4.8% chance of exploitation in the next 30 days. A argument injection vulnerability in the 'packet-trace' CLI command of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series…
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-2023-34140, 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…