CVE-2025-27495: Critical SQL Injection Vulnerability in TeleControl Server Basic

Overview

The cybersecurity landscape is fraught with hazards, and one of the more severe vulnerabilities that has recently come to light is CVE-2025-27495. This vulnerability affects all versions of TeleControl Server Basic prior to V3.1.2.2 and can potentially have catastrophic implications. TeleControl Server Basic is an application widely used across various sectors, making this vulnerability particularly severe. The flaw allows for SQL injection attacks, offering an unauthenticated remote attacker the opportunity to bypass authorization controls, manipulate the application’s database, and execute code with escalated privileges. The successful exploitation of this vulnerability carries a high risk of system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-27495
Severity: Critical – CVSS 9.8
Attack Vector: SQL Injection via Network
Privileges Required: None
User Interaction: None
Impact: Bypass Authorization, Data Manipulation, Code Execution, 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 stems from the TeleControl Server Basic application’s ‘CreateTrace’ method, which is susceptible to SQL injection. An attacker can deliver malicious SQL statements, which are executed by the application’s database, thereby bypassing the application’s authorization controls. This allows the attacker to read from and write to the application’s database and also execute code with “NT AUTHORITY\NetworkService” permissions. The exploit is dependent on the attacker having access to port 8000 on the system running a vulnerable version of the application.

Conceptual Example Code

To illustrate the potential exploitation of this vulnerability, consider the following conceptual example:

POST /CreateTrace HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "traceDetails": "' OR '1'='1'; DROP TABLE users; --" }

This conceptual example demonstrates how an SQL injection attack could potentially be carried out. The malicious SQL statement “‘ OR ‘1’=’1′; DROP TABLE users; –” is injected through the traceDetails parameter. The application’s database will interpret this as a valid SQL statement, leading to the potential dropping of the users table.

Mitigation Guidance

The recommended course of action to mitigate this vulnerability is to apply the vendor’s patch, updating TeleControl Server Basic to version V3.1.2.2 or later. If this is not immediately possible, implementing a Web Application Firewall(WAF) or Intrusion Detection System( IDS) can provide temporary protection by monitoring and potentially blocking malicious traffic. However, these are not long-term solutions and updating the application should be prioritized to ensure sustained security.