Command Injection in Zyxel CPE Series - CVE-2024-40891
Published: January 30, 2025 / Updated: March 2, 2026
Vulnerability identifier: #VU103449
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2024-40891
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: ZyXEL Communications Corp.
Affected software:
Zyxel CPE Series
Zyxel CPE Series
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation. A remote unauthenticated attacker can send specially crafted packets to the telnet interface of a device and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note, the vulnerability is being actively exploited in the wild.How to mitigate CVE-2024-40891
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.