Telesquare routers are vulnerable to a critical authorization bypass that allows attackers to access sensitive system information and administrative functions without proper credentials.

The firmware contains an IDOR flaw where user-supplied input parameters are used to reference internal objects directly. An attacker can manipulate these parameters to bypass security checks and access resources they are not authorized to view.

A successful exploit allows for the unauthorized retrieval of sensitive configuration data, user credentials, or administrative control of the device. Given the CVSS score of 9.8, this vulnerability represents a near-total breakdown of the device's access control logic, potentially exposing the entire network segment managed by the router.

Immediate Action: Update the Telesquare SDT-CS3B1 firmware to the latest version to implement proper server-side authorization checks for all object references.

Proactive Monitoring: Audit web server logs for sequential or anomalous parameter changes in HTTP requests that might indicate an IDOR discovery attempt.

Compensating Controls: Implement an IP-based access control list (ACL) to restrict access to the router's management interface to known, trusted administrative workstations only.

Public Exploit Available: false

This critical IDOR vulnerability must be addressed immediately by updating the device firmware. Insecure Direct Object Reference flaws are often easy to exploit with automated tools; therefore, isolating the device management interface from the internet is a vital secondary defense.