ACTIVELY EXPLOITED
CVE-2024-40891: Zyxel DSL CPE OS Command Injection Vulnerability
| Vendor | Zyxel |
|---|---|
| Product | DSL CPE Devices |
| Actively exploited | Yes |
| Added to CISA KEV | 11 Feb 2025 |
| CISA federal deadline | 4 Mar 2025 |
| Weakness (CWE) | CWE-78 |
Required action (CISA's text)
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.
Description (NVD)
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.
SOURCES
Other Zyxel flaws
- CVE-2026-7273: Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
- CVE-2024-40890: Zyxel DSL CPE OS Command Injection Vulnerability
- CVE-2024-11667: Zyxel Multiple Firewalls Path Traversal Vulnerability
- CVE-2017-6884: Zyxel EMG2926 Routers Command Injection Vulnerability
- CVE-2017-18368: Zyxel P660HN-T1A Routers Command Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.