Cybersecurity Risks and Threats to Aging Critical Infrastructure and Renewable Energy Systems
Critical infrastructure worldwide, including power grids, water systems, and transportation networks, is increasingly vulnerable due to aging hardware and outdated cybersecurity measures. Many of these systems, built between the 1950s and 1970s, were never designed for the hyperconnected digital environment of today, leaving them exposed to both physical decay and cyber threats. In the United States, nearly 70% of the power grid is over 25 years old, and similar conditions exist in Europe, with a significant portion of bridges and other infrastructure in need of repair. As operators modernize these systems with digital controls and cloud-based monitoring, new attack surfaces emerge, such as legacy interfaces, unpatched software, and unsupported protocols, which can be exploited by threat actors. The interconnectedness of these systems means that a single vulnerability, such as an infected maintenance laptop or a misconfigured firewall, can have cascading effects across multiple sectors. The adoption of digital twins and shared data platforms is helping operators predict failures and coordinate responses, but the risk remains high. The rapid growth of renewable energy, particularly solar power, has introduced additional cybersecurity challenges. Solar inverters, aggregators, and control software have become attractive targets for cybercriminals, as demonstrated by real-world incidents where hackers exploited default credentials and known software flaws to hijack remote monitoring devices. The FBI has issued alerts about threats to renewable energy systems, and experts warn that tampering with connected infrastructures, including EV charging networks, could lead to widespread blackouts. The transition to renewables is outpacing the implementation of robust cybersecurity measures, making the sector a potential weak link in national energy resilience. High-profile attacks, such as the hijacking of 800 monitoring devices in Japan using a Mirai botnet-linked vulnerability, highlight the global nature of the threat. Hacktivist groups have also targeted solar monitoring systems, further exposing the sector's vulnerabilities. The integration of renewables into the grid, often outside the direct control of traditional operators, complicates efforts to secure the entire energy ecosystem. As the share of renewables in power generation is projected to rise significantly by 2030, the urgency to address these cybersecurity gaps is growing. Experts emphasize the need for proactive monitoring, regular updates, and coordinated information sharing between engineers and security teams to mitigate risks. The resilience of critical infrastructure now depends not only on physical maintenance but also on the ability to anticipate and defend against sophisticated cyber threats targeting both legacy and emerging technologies.
Timeline
Oct 14, 2025
Reports raise concern over undocumented modules in Chinese-made inverters
Reports emerged that some Chinese-made inverters contain undocumented communication modules that could bypass perimeter defenses. The issue heightened supply-chain and hardware integrity concerns for solar deployments.
Oct 14, 2025
Researchers report dozens of inverter vulnerabilities
Researchers disclosed that solar inverters contain dozens of vulnerabilities that could enable compromise at fleet scale. The findings emphasized the inverter as a particularly exposed component because of growing Wi‑Fi, cellular, and cloud connectivity.
Oct 14, 2025
Just Evil targets Ignitis Group solar monitoring system
The hacktivist group Just Evil reportedly attacked a solar monitoring system used by Lithuania's Ignitis Group. The incident underscored that solar monitoring platforms are becoming direct targets for disruptive or politically motivated activity.
Oct 14, 2025
Mirai-linked flaw used to hijack monitoring devices in Japan
Remote monitoring devices in Japan were reportedly hijacked via a known vulnerability associated with Mirai, showing how internet-exposed renewable energy components can be co-opted through commodity exploitation. The case highlighted risks to monitoring and control systems connected to solar operations.
Oct 14, 2025
Default credentials expose solar plant in India
A solar power plant in India was reportedly accessible using default credentials, illustrating weak authentication practices in renewable energy environments. The incident is cited as an example of real-world exposure in operational solar infrastructure.
Jul 1, 2024
FBI issues industry alert on threats to renewable energy systems
The FBI published an industry alert warning about cyber threats targeting renewable energy systems, reflecting growing institutional concern over the sector's exposure. The alert was specifically noted as having been issued in July 2024.
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