CVE-2026-14818 PUBLISHED

Assigner: Zyxel
Reserved: 06.07.2026 Published: 04.08.2026 Updated: 04.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.2

Product Status

Vendor Zyxel
Product ATP series firmware
Versions Default: unaffected
  • Version from V4.32 through V5.42 Patch 1 is affected
Vendor Zyxel
Product USG FLEX series firmware
Versions Default: unaffected
  • Version from V4.50 through V5.42 Patch 1 is affected
Vendor Zyxel
Product USG FLEX 50(W) series firmware
Versions Default: unaffected
  • Version from V4.16 through V5.42 Patch 1 is affected
Vendor Zyxel
Product USG20(W)-VPN series firmware
Versions Default: unaffected
  • Version from V4.16 through V5.42 Patch 1 is affected

References

Problem Types

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE