HIGH

CVE-2026-14818

Zyxel — ATP series firmware

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.

CVSS7.2

EPSS0.4%

Exploit StatusNot Assessed

PublishedAug 04, 2026

Last ModifiedAug 04, 2026

VendorZyxel

ProductATP series firmware

Weakness (CWE)CWE-22

View on NVD

Vulnerability Timeline

PublishedAug 04, 2026

Last ModifiedAug 04, 2026

Seraph Context

Technology Watch Match

Available for technologies you monitor inside Seraph CTI.

Relevant Threat Actors

Surfaced automatically when a documented actor is linked to this CVE.

Sector Context

Shown when this vendor/product is relevant to your industry.

Exploitation Context

Campaign and indicator context, where Seraph analysts have published it.

References

https://www.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

More from Zyxel in the catalogue.

CVE-2026-8508WAX650S firmwarePublished Aug 04, 2026 CVE-2026-6837WAX650S firmwarePublished Aug 04, 2026 CVE-2024-40891DSL CPE DevicesPublished Feb 11, 2025

Does this affect technology you run?

Declare your technology stack inside Seraph CTI and get notified the moment a vulnerability matches it.

Explore Seraph CTI Back to Vulnerability Catalogue