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Zyxel ATP and USG FLEX CLI path traversal allows admin with elevated privileges to execute malicious configuration files

Last refreshed2026-09-30

Status: NEW  |  Advisory ID: CVE-2026-14818

Key Details

CVECVE-2026-14818
CVSS Score / Version7.2 (High) / CVSS v3.1
Updated2026-08-04
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is high; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Classified asCWE-22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))

What to Know

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.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-14818
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-14818