CVE-2025-0890

CRITICAL EXPLOITED

Zyxel Vmg4325-b10a Firmware - Authentication Bypass

Title source: rule

Description

**UNSUPPORTED WHEN ASSIGNED** Insecure default credentials for the Telnet function in the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an attacker to log in to the management interface if the administrators have the option to change the default credentials but fail to do so.

References (1)

[Vendor Advisory] https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-insecure-default-credentials-vulnerabilities-in-certain-legacy-dsl-cpe-02-04-2025

Scores

CVSS v3 9.8

EPSS 0.2379

EPSS Percentile 96.0%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

VulnCheck KEV 2026-01-20

CWE

CWE-522 CWE-287

Status published

Products (14)

zyxel/sbg3300-n000_firmware

zyxel/sbg3300-nb00_firmware

zyxel/sbg3500-n000_firmware

zyxel/sbg3500-nb00_firmware

zyxel/vmg1312-b10a_firmware

zyxel/vmg1312-b10b_firmware

zyxel/vmg1312-b10e_firmware

zyxel/vmg3312-b10a_firmware

zyxel/vmg3313-b10a_firmware

zyxel/vmg3926-b10b_firmware

... and 4 more

Published Feb 04, 2025

Tracked Since Feb 18, 2026