CVE-2026-78314: Delta DIAEnergie SQL Injection RCE

CVE-2026-78314 Overview

CVE-2026-78314 is a SQL injection vulnerability affecting Delta Electronics DIAEnergie version 1.11.00.002. The flaw allows an authenticated remote attacker to inject malicious SQL statements into backend database queries. Successful exploitation leads to remote code execution on the underlying host running the DIAEnergie industrial energy management platform. The vulnerability is classified under CWE-89 for improper neutralization of special elements used in an SQL command. Delta Electronics published a security advisory documenting the issue and providing remediation guidance for operators of affected DIAEnergie deployments.

Critical Impact

Authenticated network-based SQL injection in DIAEnergie enables remote code execution on the server, compromising confidentiality, integrity, and availability of industrial energy monitoring systems.

Affected Products

• Delta Electronics DIAEnergie v1.11.00.002
• Earlier DIAEnergie 1.x releases sharing the vulnerable code path (see vendor advisory)
• Industrial energy management deployments exposing DIAEnergie web interfaces

Discovery Timeline

• 2026-08-24 - CVE-2026-78314 published to NVD
• 2026-08-24 - Last updated in NVD database

Technical Details for CVE-2026-78314

Vulnerability Analysis

DIAEnergie is Delta Electronics' web-based industrial energy management system used to monitor consumption across manufacturing environments. The affected version fails to properly neutralize user-supplied input before passing it into SQL queries. An authenticated attacker with low privileges can submit crafted parameters that alter query structure. Because DIAEnergie runs on Microsoft SQL Server, attackers can escalate SQL injection into operating system command execution using stacked queries and stored procedures such as xp_cmdshell. This transforms a database-layer flaw into full remote code execution on the host.

Root Cause

The root cause is the concatenation of untrusted HTTP request parameters directly into SQL query strings without parameterized queries or input validation. The vulnerable code paths accept attacker-controlled input from authenticated sessions and construct dynamic SQL without applying prepared statements or type-safe binding. This pattern is a canonical [CWE-89] SQL injection weakness.

Attack Vector

Exploitation requires network access to the DIAEnergie web interface and valid low-privilege credentials. The attacker sends HTTP requests containing SQL metacharacters in parameters processed by vulnerable endpoints. The injected payload modifies query semantics, extracts sensitive data, or invokes database-level command execution primitives. Because the service runs with elevated privileges on the host, code execution inherits those permissions. Refer to the Delta Electronics Security Advisory for endpoint-level technical detail.

Detection Methods for CVE-2026-78314

Indicators of Compromise

• Unexpected xp_cmdshell invocations or stored procedure calls in Microsoft SQL Server audit logs.
• Anomalous child processes spawned by the DIAEnergie application pool or SQL Server service accounts.
• HTTP request logs containing SQL metacharacters such as ', ;, UNION SELECT, or WAITFOR DELAY in DIAEnergie query parameters.
• Outbound connections from the DIAEnergie host to unknown external infrastructure following authentication events.

Detection Strategies

• Deploy web application firewall rules that flag SQL injection patterns targeting DIAEnergie endpoints.
• Enable SQL Server auditing for schema enumeration queries and command-execution stored procedures.
• Correlate authentication events on DIAEnergie with subsequent database anomalies to identify credential abuse.
• Baseline normal DIAEnergie query patterns and alert on deviations such as batched statements or comment sequences.

Monitoring Recommendations

• Forward DIAEnergie web server, IIS, and SQL Server logs to a centralized analytics platform for correlation.
• Monitor process creation events on the DIAEnergie host for shell interpreters spawned by SQL Server processes.
• Track integrity of DIAEnergie configuration files and database credentials to detect post-exploitation persistence.

How to Mitigate CVE-2026-78314

Immediate Actions Required

• Apply the security update referenced in the Delta Electronics Security Advisory as the primary remediation.
• Restrict network access to DIAEnergie web interfaces so they are reachable only from trusted operational technology (OT) management segments.
• Rotate DIAEnergie application and database credentials, especially any accounts with elevated SQL Server privileges.
• Audit DIAEnergie hosts for signs of prior exploitation, including unexpected accounts, scheduled tasks, or binaries.

Patch Information

Delta Electronics has published patch guidance in advisory Delta-PCSA-2026-00015. Operators should upgrade DIAEnergie beyond version 1.11.00.002 to the fixed release identified in the advisory. Consult the vendor documentation for supported upgrade paths and any prerequisite database migration steps.

Workarounds

• Place DIAEnergie behind a reverse proxy or WAF configured to block SQL injection payloads until patching is complete.
• Disable xp_cmdshell and other command-execution stored procedures on the SQL Server backing DIAEnergie.
• Enforce least-privilege database accounts so the DIAEnergie service cannot execute administrative SQL commands.
• Require multi-factor authentication and IP allow-listing on accounts that can reach the DIAEnergie login page.

# Disable xp_cmdshell on the SQL Server hosting DIAEnergie
sqlcmd -S <SERVER> -Q "EXEC sp_configure 'show advanced options', 1; RECONFIGURE; EXEC sp_configure 'xp_cmdshell', 0; RECONFIGURE;"