CVE-2025-0890

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 14.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-04 · updated 2026-06-17
Weakness: CWE-287

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.

Affected products

Zyxel Sbg3300-N000 Firmware: all versions
Zyxel Sbg3300-Nb00 Firmware: all versions
Zyxel Sbg3500-N000 Firmware: all versions
Zyxel Sbg3500-Nb00 Firmware: all versions
Zyxel Vmg1312-B10A Firmware: all versions
Zyxel Vmg1312-B10B Firmware: all versions
Zyxel Vmg1312-B10E Firmware: all versions
Zyxel Vmg3312-B10A Firmware: all versions
Zyxel Vmg3313-B10A Firmware: all versions
Zyxel Vmg3926-B10B Firmware: all versions
Zyxel VMG4325-B10A firmware: all versions
Zyxel Vmg4380-B10A Firmware: all versions
Zyxel Vmg8324-B10A Firmware: all versions
Zyxel Vmg8924-B10A Firmware: all versions

References

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

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