PT-2026-67635 · Zyxel · Atp Series Firmware+3

CVE-2026-14818 · Published 2026-08-04 · Updated 2026-08-04

NVD

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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) series firmware versions from V4.16 through V5.42 Patch 1, and USG20(W)-VPN series firmware versions from V4.16 through V5.42 Patch 1 could allow an authenticated attacker with administrator privileges to execute a crafted malicious configuration file on an affected device.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-14818

Affected Products

Atp Series Firmware

Usg Flex 50(W) Series Firmware

Usg Flex Series Firmware

Usg20(W)-Vpn Series Firmware

References · 2

• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-path-traversal-vulnerability-in-the-configuration-file-execution-cli-command-of-zld-firewalls-08-04-2026 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-14818 · Security Note