Critical SQL Injection Hits PROCON-WEB SCADA

A critical security flaw, identified as CVE-2026-16462, has been discovered in PROCON-WEB SCADA. The vulnerability exists within the GetGridData endpoint, which fails to properly sanitize user-supplied input, allowing remote, unauthenticated attackers to execute arbitrary SQL commands against the underlying database.

With a CVSS 3.1 score of 9.8, this vulnerability is classified as critical. It carries a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating that the flaw is remotely exploitable with low complexity and requires no user interaction or privileges to execute.

What's at Risk

The vulnerability impacts PROCON-WEB SCADA systems that utilize the vulnerable endpoint. Organizations that maintain internet-facing SCADA deployments are at the highest level of risk, as the lack of authentication requirement allows any remote actor to interact with the system.

SCADA systems are typically used for industrial control and monitoring, meaning that successful exploitation could lead to unauthorized data access, modification of critical system records, or the disruption of operational processes. Systems that are exposed directly to the public internet are significantly more vulnerable to automated scanning and exploitation attempts.

How the Flaw Works

This vulnerability is a form of SQL injection, a class of security weakness where an application fails to separate data from commands when interacting with a database. In general terms, when an application takes user input and includes it directly in a database query without sufficient validation or parameterization, an attacker can supply specially crafted strings to manipulate the structure of that query.

By injecting malicious SQL syntax, an attacker can trick the database into performing unauthorized actions. This can include bypassing authentication, accessing sensitive information stored in database tables, modifying or deleting data, and in some database configurations, executing administrative commands on the host server. Because the application processes these commands with its own database permissions, the impact is often as severe as the permissions assigned to the application's database service account.

How to Protect Your Systems

• Review the official advisory from VDE to determine if a patch or configuration workaround is available for your specific deployment.
• Restrict access to the GetGridData endpoint at the network level if an immediate patch cannot be applied.
• Implement network segmentation to ensure that SCADA systems are not directly reachable from the public internet.
• Monitor system logs for unusual database queries or unexpected spikes in traffic directed at web endpoints.
• Enforce strict access control lists to limit which IP addresses can communicate with your SCADA management interfaces.

Given the 9.8 CVSS score and the ease with which this flaw can be exploited by unauthenticated remote actors, organizations should treat this as a priority. Promptly applying vendor-provided updates is the most effective way to eliminate the underlying vulnerability and prevent potential unauthorized access to industrial control environments.