When procurement teams approve a new multi-megawatt EV charging station, they typically focus on the physical specifications: the steel enclosure, liquid-cooled charging cables, and peak power output. At first glance, it appears to be another piece of electrical infrastructure.

Remove the enclosure, however, and a modern high-power charging station resembles an enterprise Linux server connected directly to a high-voltage power inverter.

Beneath its rugged exterior, these systems run sophisticated operating systems composed of proprietary software, third-party components, and open-source libraries. As EV infrastructure continues expanding worldwide, one critical question is becoming increasingly difficult to answer: Do we truly know what software is running inside our charging stations?

For networking specialists, firmware developers, and cybersecurity professionals, the rapid deployment of EV charging infrastructure has exposed a highly complex software supply chain. Securing that supply chain is quickly becoming one of the most important engineering challenges in the energy sector.

The Digital Assembly Line: Where Open Source Meets High Voltage

Modern charging stations are not built on software developed entirely by a single vendor. To accelerate development, manufacturers depend heavily on open-source software and third-party components to support different functions throughout the charging lifecycle.

                  [ PROPRIETARY CPO FIRMWARE ]

                               │

            ┌──────────────────┴──────────────────┐

            ▼                                     ▼

[ OPEN-SOURCE LINUX OS ]          [ THIRD-PARTY PROTOCOL STACKS ]

 (Cellular Drivers, IP Routing,      (OCPP 2.0.1, ISO 15118,

  Guest Wi-Fi Services)               Cryptographic Functions)

            │                                     │

            └──────────────────┬──────────────────┘

                               ▼

              [ KERNEL & MEMORY MANAGEMENT ]

                               │

                               ▼

               [ EMBEDDED MICROCONTROLLER / OT ]

Operating System Layer

A lightweight Linux distribution manages system resources, cellular communications, network routing, and peripheral hardware.

Protocol Layer

Commercial and open-source protocol libraries process OCPP communications, ISO 15118 authentication, and the XML and JSON messaging required for cloud connectivity.

Hardware Driver Layer

Embedded firmware running on industrial microcontrollers translates software instructions into precise electrical control of high-voltage charging equipment.

This layered software architecture means a single charging station may contain hundreds of open-source and third-party software dependencies. If even one of those components contains an undiscovered vulnerability, both the charging station and the network it connects to could become exposed.

The Threat Landscape: Exploiting Invisible Dependencies

Software supply chain attacks have already demonstrated their impact in enterprise environments through incidents such as Log4Shell and other open-source vulnerabilities. Within EV charging infrastructure, similar weaknesses could provide attackers with persistent access to critical operational systems.

1. Embedded Parser Exploits

Charging stations continuously process complex data exchanged with both connected vehicles through ISO 15118 and cloud platforms through OCPP. This communication depends heavily on software parsers. If a third-party XML or JSON parser contains a memory management flaw, such as a buffer overflow, an attacker could craft a malicious data packet originating from either a connected vehicle or a cloud management platform. Such an attack could crash the charging station or, in more severe cases, enable remote code execution (RCE) with elevated privileges.

2. Persistent Backdoors Through Third-Party Components

Many charging stations incorporate software maintained through community-supported open-source projects. If attackers successfully compromise a software repository or introduce malicious code into a trusted dependency before release, that code could eventually be distributed through routine firmware updates. As a result, thousands of charging stations could unknowingly receive compromised software that establishes persistent unauthorized access.

3. Unsupported Legacy Infrastructure

The EV industry is evolving rapidly, and some early hardware vendors have already discontinued older product lines. Organizations may find themselves operating unsupported charging stations that no longer receive firmware updates or security patches. These legacy systems gradually accumulate unaddressed vulnerabilities, increasing operational risk over time.

Engineering the Shield: Advancing Software Transparency

The growing risk posed by undocumented software dependencies is driving stronger regulatory expectations around software transparency. Governments, utilities, and critical infrastructure operators increasingly expect organizations to understand exactly which software components exist within every deployed charging station.

1. Automated Software Bill of Materials (SBOM) Analysis

An SBOM functions as a comprehensive software inventory—a machine-readable record of every software component included within a firmware image.

Modern security platforms automatically analyze compiled firmware, identify embedded software components, compare them against known vulnerability databases, and alert operators whenever newly disclosed vulnerabilities affect deployed software.

2. Cryptographic Firmware Attestation

Traditional perimeter security alone cannot prevent malicious or tampered software updates.

To strengthen software integrity, modern charging stations increasingly implement Remote Attestation. Before installing an over-the-air (OTA) update or launching critical software, the platform verifies cryptographic measurements of its firmware against trusted values securely stored within hardware-based trust anchors. If verification fails, the charging station can automatically halt the boot process and enter a secure recovery state.

3. Containerized Runtime Environments

Modern charging platforms are increasingly adopting containerized application architectures rather than relying on monolithic firmware designs.

By isolating services such as payment processing, guest Wi-Fi, and user interfaces into separate runtime environments, organizations significantly reduce the likelihood that attackers can escape an exploited application and gain access to critical charging controls or the underlying operating system.

Technical Supply Chain Safeguards

The Last Word

Building a resilient EV charging ecosystem is no longer solely an electrical engineering challenge—it is equally a software supply chain security challenge. Organizations cannot effectively defend infrastructure unless they understand every software component operating within it.

As the industry matures, the organizations that lead the market will distinguish themselves not only through rapid infrastructure deployment but also through comprehensive visibility into—and control over—their software supply chains. For software engineers, firmware developers, and cybersecurity professionals, securing the invisible software powering the EV ecosystem will become one of the defining engineering challenges of the coming decade.