Remote command injection in Zyxel CPE Series



| Updated: 2025-01-30
Risk Critical
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2024-40891
CWE-ID CWE-77
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Zyxel CPE Series
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor ZyXEL Communications Corp.

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Command Injection

EUVDB-ID: #VU103449

Risk: Critical

CVSSv4.0: [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 - Command injection

Exploit availability: No

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.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Zyxel CPE Series: All versions

CPE2.3 External links

http://www.greynoise.io/blog/active-exploitation-of-zero-day-zyxel-cpe-vulnerability-cve-2024-40891


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?



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