CVE-2025-32853: SQL Injection Vulnerability in TeleControl Server Basic

Overview

In this post, we are delving into the details of a severe security vulnerability identified in all versions of TeleControl Server Basic prior to V3.1.2.2. This vulnerability, CVE-2025-32853, exposes the affected systems to SQL injection attacks through an internally used method. For organizations using TeleControl Server Basic, this vulnerability could potentially lead to a system compromise or data leakage, thereby posing a significant cybersecurity threat. Understanding the details of this vulnerability, its impact, and mitigation steps are essential to protect crucial system data and maintain the integrity of your digital infrastructure.

Vulnerability Summary

CVE ID: CVE-2025-32853
Severity: High (CVSS score 8.8)
Attack Vector: Network
Privileges Required: Low
User Interaction: None required
Impact: System compromise, data leakage

Affected Products

Product | Affected Versions

TeleControl Server Basic | All versions < V3.1.2.2 How the Exploit Works

The vulnerability lies in the ‘UnlockDatabaseSettings’ method used internally by TeleControl Server Basic. This method is susceptible to SQL injection, which is a code injection technique that attackers use to exploit vulnerabilities in a software application’s database layer.
In this case, an authenticated remote attacker can inject malicious SQL code into the ‘UnlockDatabaseSettings’ method. This allows the attacker to bypass authorization controls, read from and write to the application’s database, and even execute code with “NT AUTHORITYNetworkService” permissions. The exploitation requires the attacker to access port 8000 on a system running a vulnerable version of the affected application.

Conceptual Example Code

Consider the following
conceptual
example of how an attacker might exploit this vulnerability:

POST /UnlockDatabaseSettings HTTP/1.1
Host: vulnerable.example.com:8000
Content-Type: application/sql
{ "database_command": "DROP TABLE users;" }

In this example, the attacker sends a malicious HTTP POST request to the application’s ‘UnlockDatabaseSettings’ endpoint with a SQL command that drops the ‘users’ table from the database.

Recommended Mitigations

To mitigate this vulnerability, users of TeleControl Server Basic should immediately apply the vendor patch. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. However, these are only temporary solutions that can prevent exploitation of the vulnerability, not remove it. Therefore, applying the vendor’s patch as soon as possible is highly recommended.