Zyxel DSL CPE Devices < 1.00 — RCE

A remote attacker, with a low-privilege account, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2025-03-04 under CISA BOD 22-01.

This is a OS Command Injection (CWE-78) vulnerability in Zyxel DSL CPE Devices. **UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the management commands of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an authenticated attacker to execute operating system (OS) commands on an affected device via Telnet. Exploitation requires remote network access, low attack complexity, a low-privilege authenticated account, and no user interaction required.

Probably yes if any of these apply:

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2025-02-11 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2025-03-04.