Path Traversal in Zyxel Atp Series Firmware
CVE-2026-14818
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 50(W…
Vulnerability class: Path Traversal (Directory Traversal)
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Atp Series Firmware — versions from V4.32 through V5.42 Patch 1
- Zyxel Usg20(w)-vpn Series Firmware — versions from V4.16 through V5.42 Patch 1
- Zyxel Usg Flex 50(w) Series Firmware — versions from V4.16 through V5.42 Patch 1
- Zyxel Usg Flex Series Firmware — versions from V4.50 through V5.42 Patch 1
Weakness classification (CWE)
References
- security@zyxel.com.tw (vendor-advisory)
Frequently asked questions
- What is CVE-2026-14818?
- CVE-2026-14818 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under Path Traversal. CVSS score: 7.2/10. Published 2026-08-04.
- How severe is CVE-2026-14818?
- High severity. CVSS v3 base score is 7.2 out of 10.