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CVE-2026-14818

Quick assessment

Affected
Zyxel ATP series firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel ATP series firmware是中国Zyxel公司的一款网络安全设备固件。 Zyxel ATP series firmware V4.32版本至V5.42 Patch 1版本、USG FLEX series firmware V4.50版本至V5.42 Patch 1版本、USG FLEX 50(W) series firmware V4.16版本至V5.42 Patch 1版本和USG20(W)-VPN series firmware V4.16版本至V5.42 Patch 1版本存

CVSS 7.2 · High EPSS 0.57% · P45

Affected Version Matrix 4

VendorProduct Version RangeStatus
Zyxel ATP series firmware from V4.32 through V5.42 Patch 1 affected
Zyxel USG FLEX 50(W) series firmware from V4.16 through V5.42 Patch 1 affected
Zyxel USG FLEX series firmware from V4.50 through V5.42 Patch 1 affected
Zyxel USG20(W)-VPN series firmware from V4.16 through V5.42 Patch 1 affected
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I. Basic Information for CVE-2026-14818

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel ATP series firmware 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel ATP series firmware是中国Zyxel公司的一款网络安全设备固件。 Zyxel ATP series firmware V4.32版本至V5.42 Patch 1版本、USG FLEX series firmware V4.50版本至V5.42 Patch 1版本、USG FLEX 50(W) series firmware V4.16版本至V5.42 Patch 1版本和USG20(W)-VPN series firmware V4.16版本至V5.42 Patch 1版本存
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel ATP series firmware from V4.32 through V5.42 Patch 1 -
Zyxel USG FLEX series firmware from V4.50 through V5.42 Patch 1 -
Zyxel USG FLEX 50(W) series firmware from V4.16 through V5.42 Patch 1 -
Zyxel USG20(W)-VPN series firmware from V4.16 through V5.42 Patch 1 -

II. Public POCs for CVE-2026-14818

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III. Intelligence Information for CVE-2026-14818

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Vendor Advisories for CVE-2026-14818 (1)

Same Patch Batch · Zyxel · 2026-08-04 · 3 CVEs total

CVE-2026-6837 7.2 HIGH Zyxel wax650s firmware 命令注入漏洞
CVE-2026-8508 6.5 MEDIUM Zyxel wax650s firmware 授权问题漏洞

IV. Related Vulnerabilities

Same product: ATP series firmware
Same vendor: Zyxel
Same weakness: CWE-22

V. Comments for CVE-2026-14818

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