Palo Alto Networks Report Finds Legacy OT Systems Undermine Critical Infrastructure Cyber Resilience
A 2026 report by Palo Alto Networks reveals that legacy operational technology systems and fragmented security tools significantly weaken the cyber posture of critical infrastructure organizations.
Key points
- Palo Alto Networks released the 2026 State of Critical Infrastructure Cybersecurity report.
- The report identifies legacy OT systems as a primary factor undermining cyber resilience.
- Fragmented security tools further complicate the defense of critical infrastructure networks.
Palo Alto Networks published findings in its 2026 State of Critical Infrastructure Cybersecurity report, highlighting significant vulnerabilities within the sector. According to the report, legacy operational technology systems and fragmented security tools are actively undermining the cyber resilience of critical infrastructure organizations.
The report indicates that sixty percent of critical infrastructure organizations experienced negative impacts due to these systemic weaknesses. These findings suggest that outdated hardware and software combinations create persistent risks that are difficult to mitigate with standard security protocols. The data points to a widespread struggle in maintaining consistent security postures across complex industrial environments.
Context and Background
The 2026 State of Critical Infrastructure Cybersecurity report by Palo Alto Networks serves as a comprehensive assessment of current threats. It focuses on how technical debt in operational technology sectors creates exploitable gaps for potential attackers. The study emphasizes that the integration of old systems with modern networks often leaves critical assets exposed to sophisticated cyber threats.
Legacy systems were designed in an era without modern connectivity requirements, making them inherently vulnerable. When these systems are connected to broader networks, they often lack the necessary security controls to prevent unauthorized access. This architectural mismatch is a central theme in the Palo Alto Networks analysis of current infrastructure risks.
Who Is Affected
Critical infrastructure organizations are the primary entities affected by the findings in this report. These organizations manage essential services such as energy, water, and transportation, making their security posture a matter of public safety. The report suggests that the majority of these entities are currently operating with compromised resilience due to their reliance on aging technology.
The fragmentation of security tools exacerbates the problem for these organizations. When security solutions do not communicate effectively, gaps in visibility and response capabilities emerge. This lack of cohesion prevents security teams from having a unified view of their network, allowing threats to persist undetected for longer periods.
What should you do?
Security professionals should review their current operational technology inventory to identify legacy systems that may pose disproportionate risks. Assessing the connectivity of these older systems can help determine where additional isolation or monitoring is required. Organizations should also evaluate their security tool stack for fragmentation issues that could hinder incident response efforts.
What to do and how to stay safe: Palo Alto Networks
- Audit existing operational technology assets to identify legacy systems that lack modern security patches or controls.
- Review the integration status of all security tools to ensure they provide a unified view of the network environment.
- Implement network segmentation strategies to isolate critical legacy systems from more vulnerable parts of the infrastructure.
- Monitor for unusual traffic patterns originating from or targeting older operational technology devices within the network.
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is the main finding of the Palo Alto Networks 2026 report?
The report finds that legacy OT systems and fragmented security tools undermine the cyber resilience of critical infrastructure organizations.
How many critical infrastructure organizations were affected by these issues?
According to the report, sixty percent of critical infrastructure organizations experienced impacts from these vulnerabilities.
What specific factors are cited as undermining cyber resilience?
The report cites legacy operational technology systems and the fragmentation of security tools as the primary undermining factors.
