CVE-2025-13943

8.8 HIGH

Published: February 24, 2026 Modified: February 25, 2026

Description

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026

Source: security@zyxel.com.tw

Vendor Advisory

1 reference(s) from NVD

Quick Stats

CVSS v3 Score

8.8 / 10.0

EPSS (Exploit Probability)

0.2%

38th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-78

Affected Vendors

zyxel

Related CVEs

CVE-2026-2756 5.0

CVE-2019-25582 6.5

CVE-2019-25581 8.2

CVE-2019-25580 8.2

CVE-2019-25579 7.5