Check Point Advisories

TOTOLINK Multiple Routers Authentication Bypass (CVE-2021-35327; CVE-2023-24155)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0851
Date Published:	14 Nov 2021
Severity:	Critical
Last Updated:	Monday 14 April, 2025
Source:
Industry Reference:	CVE-2021-35327 CVE-2023-24155
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 TOTOLINK T8 V4.1.5cu
Vulnerability Description	An authentication bypass vulnerability exists in multiple TOTOLINK routers. Successful exploitation of this vulnerability would allow remote attackers to gain unauthorized access into the affected 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 TOTOLINK Multiple Routers Authentication Bypass 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: TOTOLINK Multiple Routers Authentication Bypass