CVE-2026-78309: DIAEnergie SQL Injection Vulnerability

CVE-2026-78309 Overview

CVE-2026-78309 is a SQL Injection vulnerability affecting Delta Electronics DIAEnergie versions prior to 1.11.00.022. DIAEnergie is an industrial energy management system used to monitor and analyze power consumption across manufacturing environments. An authenticated attacker with low privileges can send crafted input to vulnerable application endpoints and manipulate backend SQL queries. Successful exploitation grants read and write access to the underlying database and can lead to full compromise of the application. The weakness is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact
Authenticated attackers can read, modify, or destroy database contents and pivot to full host compromise in industrial energy monitoring environments.

Affected Products

Delta Electronics DIAEnergie versions before 1.11.00.022

Discovery Timeline

2026-09-24 - CVE-2026-78309 published to the National Vulnerability Database (NVD)
2026-09-24 - Last updated in NVD database

Technical Details for CVE-2026-78309

Vulnerability Analysis

The vulnerability resides in DIAEnergie components that construct SQL statements using unsanitized user-supplied input. An attacker authenticated to the application with low privileges can inject SQL syntax into vulnerable parameters. The injected payload is passed directly to the database engine during query execution. This allows the attacker to break out of the intended query context and append arbitrary SQL commands.

Exploitation requires only network access to the DIAEnergie web interface and valid low-privilege credentials. No user interaction is needed. Because DIAEnergie typically runs with database credentials that have broad privileges, successful injection can expose energy telemetry, operator records, and configuration data. Attackers can also stage secondary attacks such as writing files to disk through database functions or executing operating system commands via stored procedures.

Root Cause

The root cause is improper neutralization of special elements in SQL commands [CWE-89]. DIAEnergie fails to use parameterized queries or prepared statements for one or more input fields. User input is concatenated into SQL statements before execution, allowing injection of attacker-controlled syntax.

Attack Vector

The attack is executed over the network against the DIAEnergie web application. An authenticated session is required. The attacker submits a crafted HTTP request containing SQL metacharacters in a vulnerable parameter. The backend evaluates the manipulated query and returns data or performs actions outside the intended scope. For technical specifics, refer to the Delta Security Advisory.

No verified public proof-of-concept code is available for this issue at the time of publication. The vulnerability mechanism follows the standard SQL injection pattern described in the vendor advisory.

Detection Methods for CVE-2026-78309

Indicators of Compromise

Unexpected SQL syntax characters such as single quotes, UNION SELECT, --, ;, or xp_cmdshell references in DIAEnergie web request logs.
Database audit entries showing queries that reference system tables, schema metadata, or unexpected table joins originating from the DIAEnergie service account.
Outbound network connections from the DIAEnergie host to unknown destinations following suspicious web traffic.
Creation of new administrative or operator accounts within DIAEnergie that cannot be tied to a change ticket.

Detection Strategies

Enable verbose request logging on the DIAEnergie web server and inspect query strings and POST bodies for SQL keywords and encoded variants.
Deploy a Web Application Firewall (WAF) with SQL injection signatures in front of the DIAEnergie interface.
Correlate authentication events with high-volume database queries to identify low-privilege accounts generating anomalous SQL traffic.

Monitoring Recommendations

Monitor the DIAEnergie host for new processes spawned by the database or web server account, which may indicate post-injection command execution.
Alert on changes to DIAEnergie database schemas, stored procedures, and user tables outside of maintenance windows.
Track failed and successful logins to DIAEnergie and flag accounts with sudden shifts in access patterns.

How to Mitigate CVE-2026-78309

Immediate Actions Required

Upgrade DIAEnergie to version 1.11.00.022 or later as directed by Delta Electronics.
Restrict network access to the DIAEnergie web interface to trusted operator workstations and management networks only.
Rotate credentials for all DIAEnergie user accounts and the database service account used by the application.
Review web and database logs for evidence of prior exploitation before and after patching.

Patch Information

Delta Electronics has released DIAEnergie 1.11.00.022, which remediates CVE-2026-78309 along with related issues CVE-2026-78308 through CVE-2026-78313. Patch details are documented in the Delta Security Advisory PCSA-2026-00014.

Workarounds

Place the DIAEnergie server behind a WAF configured to block SQL injection payloads if immediate patching is not possible.
Enforce network segmentation so that the DIAEnergie system is isolated from general corporate networks and the internet.
Apply the principle of least privilege to the database account used by DIAEnergie, limiting it to the minimum required permissions.

bash

# Example firewall rule to restrict DIAEnergie web access to a management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP