Zyxel · DSL CPE Devices
CVE-2024-40891
Zyxel DSL CPE OS Command Injection Vulnerability
What it is
**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.
CISA: Multiple Zyxel DSL CPE devices contain a post-authentication command injection vulnerability in the management commands that could allow an authenticated attacker to execute OS commands via Telnet.
What to do
The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.
Deadline for US federal agencies: March 4, 2025
More exploited flaws from Zyxel
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Feb 11, 2025 | DSL CPE OS Command Injection | DSL CPE Devices | High 8.8 | 21% |
| Sep 21, 2026 | Stack-Based Buffer Overflow | GS1900 Series Switches | High 8.8 | 2.8% |
| Dec 3, 2024 | Path Traversal | Multiple Firewalls | High 7.5 | 2.9% |
| Sep 18, 2023 | Command Injection | EMG2926 Routers | High 8.8 | 33% |
| Aug 7, 2023 | Command Injection | P660HN-T1A Routers | Critical 9.8 | 95% |
| Jun 23, 2023 | Multiple NAS Devices Command Injection | Multiple Network-Attached Storage (NAS) Devices | Critical 9.8 | 82% |
| Jun 5, 2023 | Buffer Overflow | Multiple Firewalls | Critical 9.8 | 28% |
| Jun 5, 2023 | Buffer Overflow | Multiple Firewalls | Critical 9.8 | 29% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.