CVE-2026-14818

HighCVSS 7.2

Published: 04/08/2026(UTC)Updated: 04/08/2026(UTC)Translated: 05/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.36%

29th percentile - higher than 29% of all known CVEs

Summary

In Zyxel ATP, USG FLEX, USG FLEX 50(W), and USG20(W)-VPN firmware, there is a path traversal vulnerability in the CLI command used to execute configuration files. An authenticated attacker with administrator privileges can execute a crafted malicious configuration file on the device.

Risk Assessment

An attacker with admin rights can take control of the device, alter configuration, or execute malicious code, potentially compromising network security.

Recommendation

Upgrade the firmware to the latest version that includes a fix for the path traversal vulnerability.

Other vulnerabilities in Zyxel ATP/USG FLEX

CVE-2024-11667HighActively exploited
A directory traversal vulnerability in the web management interface of Zyxel ATP series firmware versions V5.00 through V5.38, USG FLEX series firmware versions V5.00 through V5.38, USG FLEX 50(W) series firmware versions V5.10 through V5.38, and USG20(W)-VPN series firmware versions V5.10 through V5.38 could allow an attacker to download or upload files via a crafted URL.

Original NVD description (English source)

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.