Cyber threats to SCADA systems, the backbone of critical infrastructure like water treatment and power distribution, are intensifying. According to a CNBC report, American Water, the largest water utility in the U.S., recently suffered a cyberattack that forced it to shut down critical systems, including its customer billing portal. While no water operations were directly impacted, this attack underscores how legacy SCADA systems, with outdated security measures, are prime targets for increasingly sophisticated hackers.
The Environmental Protection Agency (EPA) sounded the alarm in an enforcement alert. The enforcement alert revealed that 70% of water systems inspected fail to meet basic cybersecurity requirements. Vulnerabilities like default passwords, unpatched software, and lingering access for former employees leave these systems wide open to exploitation. With geopolitical adversaries such as Russia, China, and Iran actively targeting U.S. infrastructure, the risks of these gaps cannot be overstated.
Adding to the danger, modern tools like the Flipper Zero—a device capable of wirelessly exploiting system weaknesses—are now widely accessible and affordable. Even amateur attackers can leverage these tools to infiltrate critical infrastructure. As these threats grow, legacy SCADA systems clearly need modern, multi-layered protections to defend against evolving risks. Let us take a deeper dive and explore why legacy systems are so vulnerable and how operators can close the gaps before it is too late.
What Makes Legacy SCADA Systems Vulnerable to Modern Threats?
Legacy SCADA systems emerged at a time when cyber threats were minimal, so they often lack essential security features like encryption and access control. This makes these systems particularly vulnerable to unauthorized access. For SCADA operators, securing these legacy systems has become critical. Aviat’s Aprisa SR family provides updated security for SCADA systems with a 360° approach, addressing gaps in older networks and strengthening defenses against unauthorized entry.
How Does Multi-Layered Security Strengthen SCADA Systems?
Multi-layered security protects SCADA networks by adding defenses at every level of the system, including hardware, software, and data transmission. With multiple security layers, operators reduce the chance of a successful breach, even if one layer fails. The American Water hack shows how a single vulnerable access point created a dangerous situation.
The risks of relying on minimal security are too great. Aviat’s Aprisa SR family provides multi-layered protection for SCADA networks, securing each component and covering the security gaps often found in legacy systems.
Why is Data Integrity Important for SCADA Systems?
Data integrity is essential for SCADA operations because it guarantees that information and commands remain accurate throughout transmission. When hackers access a SCADA system, they can alter critical data, causing unsafe conditions. In the American Water incident, the attacker attempted to change chemical levels in the water supply, which could have had severe consequences.
Aprisa SR addresses this risk by verifying data integrity with Cipher Block Chaining – Message Authentication Code (CBC-MAC). This feature ensures that data remains unchanged from sender to receiver, helping operators maintain safe SCADA operations.
How Does Encryption Protect SCADA System Security?
Encryption secures SCADA data, making it difficult for unauthorized users to view or alter information. Without encryption, modern hackers can access sensitive data easily, creating significant security risks. However, legacy SCADA systems lack this layer of protection.
The Aprisa SR family protects data with AES 256-bit encryption, one of the strongest standards, securing sensitive information and preventing unauthorized access as it moves across networks.
How Can Access Control Secure Legacy SCADA Networks?
Access control ensures that only approved users have permission to update SCADA systems. In the American Water issue, weak access controls allowed the attacker to enter the system remotely. Legacy SCADA networks lack role-based access controls, making them vulnerable to similar attacks.
Aprisa SR includes role-based access management, allowing specific permissions for roles such as Technicians, Engineers, and Administrators. This setup limits access, ensuring only authorized personnel can alter critical settings.
Why is Compliance with Security Standards Important?
Following security standards like NIST, IEC, and NERC CIP help protect SCADA systems against modern cyber threats. These standards provide guidelines to secure critical infrastructure and ensure that systems remain resilient. Achieving compliance allows SCADA operators to address security gaps and meet regulatory requirements.
Aprisa SR radios meet these standards, helping SCADA operators secure their networks according to industry guidelines, even when they include legacy systems.
Legacy SCADA systems are increasingly vulnerable to cyberattacks, but with Aviat’s Aprisa SR family, operators can strengthen their networks against modern threats.
Download our comprehensive guide to learn how Aprisa SR provides essential security features, protecting your SCADA systems from evolving cyber risks.
