Connected Cars Face Rising Cybersecurity Risks as OTA Software Updates Expand
July 20, 2026
As connected vehicles become increasingly reliant on over-the-air (OTA) software updates, cybersecurity experts are warning that the same technology designed to improve convenience could also create new opportunities for cyberattacks if not properly secured.
OTA technology enables automakers to remotely update a vehicle’s software, firmware, navigation systems, and other digital features without requiring owners to visit a dealership or service center. The technology gained widespread attention after Tesla introduced large-scale OTA updates for its Model S vehicles in 2012, and it has since become a standard feature across much of the global automotive industry.
While the technology allows manufacturers to quickly deploy security patches, add new features, and improve vehicle performance, experts say the growing connectivity of modern vehicles also expands their potential attack surface.
Professor Siraj Ahmed Shaikh of Swansea University said remote software updates provide significant benefits over traditional servicing methods but emphasized that robust cybersecurity protections must remain a top priority throughout a vehicle’s lifecycle.
Security researchers have also raised concerns about the broader national security implications of connected vehicles. Singapore-based cybersecurity expert Gabriel Lim described internet-connected vehicles as a potential “unique national security risk” if hostile actors were ever able to gain unauthorized access to critical vehicle systems.
Several governments, including those in the United Kingdom, Denmark, and Norway, have also examined the cybersecurity risks associated with connected transportation systems. Officials fear that vulnerabilities in remote access technologies could, in extreme cases, allow attackers to interfere with vehicle operations if adequate safeguards are not in place.
The issue gained additional attention after Norway’s public transport operator Ruter reported discovering during a security assessment that one of its buses could be accessed through a mobile network connection. The finding prompted further reviews into the cybersecurity of connected public transport systems.
Cybersecurity specialists note that OTA technology is no longer limited to passenger cars. Similar remote update capabilities are now widely used in trains, ships, drones, industrial machinery, and other critical infrastructure, making strong digital defenses increasingly important across multiple sectors.
Industry experts recommend that automakers adopt secure software development practices, encrypt communications between vehicles and servers, implement multi-layer authentication, and conduct regular security testing. They also urge governments to strengthen cybersecurity regulations and improve transparency around software update systems.
As vehicles continue evolving into software-driven platforms, experts agree that cybersecurity must become as essential as traditional safety features, ensuring drivers can benefit from innovation without compromising security
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