CVE-2025-32854: TeleControl Server Basic SQL Injection Vulnerability

Overview

In the world of cybersecurity, few threats loom as large as those that can compromise a system remotely. One such vulnerability has been identified in the TeleControl Server Basic, an application used in a variety of industrial automation systems. This vulnerability can allow an authenticated remote attacker to bypass authorization controls, read from and write to the application’s database, and even execute code with “NT AUTHORITYNetworkService” permissions. It’s a serious threat that underscores the importance of keeping your systems updated and secure.

Vulnerability Summary

CVE ID: CVE-2025-32854
Severity: High (8.8/10)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

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

The vulnerability results from an SQL injection flaw in the ‘LockOpcSettings’ method used internally by the TeleControl Server Basic. An authenticated attacker can send specially crafted SQL commands via this method, allowing them to manipulate the application’s database directly. The vulnerability is especially dangerous because it can be used to execute code on the system under the “NT AUTHORITY\NetworkService” permissions, effectively granting the attacker similar access to the network as a system administrator.

Conceptual Example Code

The following is a conceptual example of how an attacker might exploit this vulnerability. It involves sending a malicious SQL command to the target system.

POST /LockOpcSettings HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "query": "'; DROP TABLE users; --" }

This example command would cause the system to delete the “users” table from its database. In real attacks, the malicious payload would likely be more complex, potentially compromising the system or leaking data.

Mitigation and Recommendations

The most effective way to protect your system from this vulnerability is to update your TeleControl Server Basic to version V3.1.2.2 or later. If you are unable to update immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These tools can monitor and block suspicious network traffic, helping to prevent unauthorized access to your system. It’s also crucial to monitor system logs for any unusual activity, which could indicate an attempted or successful attack.