Management Letter: DOE-OIG-26-22

March 9, 2026

Weaknesses Identified With the Department of Energy's Unclassified Cybersecurity Program in Fiscal Year 2025

During fiscal year (FY) 2025, the Office of Inspector General (OIG) conducted cybersecurity reviews to determine whether the Department of Energy's unclassified cybersecurity program was implemented in accordance with Federal and Department requirements. The OIG also performed the audit, The Department of Energy's Fiscal Year 2025 Consolidated Financial Statements, which included test work over controls related to information technology.

The management letter discusses the results of cybersecurity reviews conducted by the OIG in FY 2025 and the results of our Federal Information Security Modernization Act of 2014 evaluation.

The OIG issued 33 cybersecurity findings (including 13 repeat prior year findings) to Department sites and programs related to information technology controls. However, three of those prior year findings, along with their recommendations, are being tracked in other OIG issued reports. Additionally, the audit, The Department of Energy's Fiscal Year 2025 Consolidated Financial Statements, identified a significant deficiency related to access controls over various Department financial systems. The findings that led to the significant deficiency are included within this report.

The weaknesses occurred for a variety of reasons. For instance, deficiencies related to access controls occurred, in part, due to management not responding to changes in risks or identifying risks associated with inappropriate or unnecessary access to systems.

Without improvements to address the weaknesses identified in our report, the Department may be unable to adequately protect its information systems and data from compromise, loss, or unauthorized modification.

• DOE-OIG-26-22.pdf (418.52 KB)