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Vulnerability record · CVE-2025-0890 · published 4 February 2025

CVE-2025-0890: Zyxel vmg4325-b10a firmware improper authentication vulnerability

Zyxel · Vmg4325 B10a Firmware

**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.

9.8 CVSS 3.1 Critical EPSS 14% · top 3.7% CWE-287 · Improper authenticationCWE-522 · Insufficiently protected credentials
9.8CVSS 3.1 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-insecure-d Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-0890), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.