Vulnerability details
Advisory: SB2025013026 - Remote command injection in Zyxel CPE Series
Vulnerable component: Zyxel CPE Series
CVE-ID: CVE-2024-40891
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:A/RL:U/RC:C
CWE-ID: CWE-77 - Command injection
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.External links:
https://www.greynoise.io/blog/active-exploitation-of-zero-day-zyxel-cpe-vulnerability-cve-2024-40891
https://www.helpnetsecurity.com/2025/01/29/zyxel-cpe-devices-under-attack-vulnerability-cve-2024-40891/