This vulnerability (CVE-2025-14816) affects multiple Mitsubishi Electric products including GENESIS64, ICONICS Suite, MobileHMI, Hyper Historian, AnalytiX, and MC Works64 in specified versions. It arises from storing SQL Server credentials in cleartext within the GUI of the Hyper Historian Splitter feature when SQL Server authentication is used. A local attacker with low privileges can extract these credentials, enabling unauthorized access to the SQL Server. This access can lead to data disclosure, modification, destruction, or denial-of-service. The vulnerability is classified under CWE-317 (Cleartext Storage of Sensitive Information) and has a critical CVSS 4.0 score of 9.3. The vendor has not published an official fix or remediation at this time.

An attacker with local access and low privileges can obtain SQL Server credentials displayed in cleartext in the GUI, allowing unauthorized access to the SQL Server. This can result in disclosure, tampering, or destruction of data, and potentially cause denial-of-service conditions on the affected system. The impact is critical due to the high CVSS score and the potential for significant data compromise and service disruption.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and avoid using SQL Server authentication where possible. Monitor for vendor updates regarding patches or mitigations specific to this vulnerability.