Check Point Advisories

Zyxel NWA-1100-NH Command Injection (CVE-2021-4039)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1709
Date Published:	11 May 2023
Severity:	Critical
Last Updated:	Thursday 11 May, 2023
Source:
Industry Reference:	CVE-2021-4039
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Zyxel NWA-1100-NH firmware 2.12
Vulnerability Description	A command injection vulnerability exists in Zyxel NWA-1100-NH. Successful exploitation of this vulnerability would allow remote attackers to execute arbitrary OS commands in the effected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Zyxel NWA-1100-NH Command Injection (CVE-2021-4039) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Application Servers Protection Violation.
Attack Information: Zyxel NWA-1100-NH Command Injection (CVE-2021-4039)