CVE-2026-14818A 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…
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It affects Zyxel ATP series firmware and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Zyxel
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Zyxel ATP series firmware zyxel:atp_series_firmware (from the name) | from V4.32 through V5.42 Patch 1 | CNA record |
Zyxel USG FLEX series firmware zyxel:usg_flex_series_firmware (from the name) | from V4.50 through V5.42 Patch 1 | CNA record |
Zyxel USG FLEX 50(W) series firmware zyxel:usg_flex_50_w_series_firmware (from the name) | from V4.16 through V5.42 Patch 1 | CNA record |
Zyxel USG20(W)-VPN series firmware zyxel:usg20_w_vpn_series_firmware (from the name) | from V4.16 through V5.42 Patch 1 | CNA record |
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-08-04-2026vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.