CVE-2026-14818

highpriority · track · 0EPSS 0.006 · 46 %ileDEEU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.57% (46th) EPSS

CVSS 7.2 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-22

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

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · security@zyxel.com.twexploitability 1.2 · impact 5.9

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US

affected products (6)

Products and version ranges known to be affected.

Zyxel Firewall <5.43all versionscert_bundDE
Zyxel Firewall< 5.43cert_bundDE
Zyxel ATP series firmware≤ from V4.32 through V5.42 Patch 1enisa_euvdEU
Zyxel USG FLEX 50(W) series firmware≤ from V4.16 through V5.42 Patch 1enisa_euvdEU
Zyxel USG FLEX series firmware≤ from V4.50 through V5.42 Patch 1enisa_euvdEU
Zyxel USG20(W)-VPN series firmware≤ from V4.16 through V5.42 Patch 1enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2627Zyxel Firewall: Schwachstelle ermöglicht CodeausführungDeutsch2026-08-03csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Zyxel Firewall ausnutzen, um beliebigen Programmcode auszuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-08-04modified 2026-08-04

references (3)

External citations — patches, advisories, analysis.

scry

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