Firmware Security Analysis

We obtain the firmware however is realistic: a vendor-supplied image, a downloaded update file, or a dump we pull from the flash on the board. Using binwalk and manual carving we unpack the file system and bootloader, identify the architecture and OS, and rebuild a working view of the image even when the vendor tried to obscure or lightly encrypt it. Obfuscation slows us down; it does not stop the analysis.

We comb the extracted file system for hardcoded credentials, private keys, certificates, hardcoded API endpoints and tokens, and configuration that reveals how the device talks to your cloud. We build a software bill of materials and match every component against known vulnerabilities, then reverse the custom binaries with Ghidra to find memory-safety bugs and logic flaws in the services that face the network. This is slow, deliberate work, and it is exactly the part an automated pass skips over.

Where possible we emulate the firmware with QEMU or a harness so we can exercise its web interface, network daemons and APIs without needing a rack of physical units. This is where command injection, authentication bypass and buffer overflows in the running services surface, the flaws that turn a device on a home or factory network into a foothold for reaching everything else on that network.

We attack the update mechanism directly: can we craft an unsigned or modified image the device will accept, force a downgrade to a vulnerable version, or intercept and tamper with an OTA in transit? A broken update path is one of the worst findings a connected product can have, because it converts a bug into permanent, fleet-wide control. You get the report within days, with reproduction steps and a live walkthrough, plus a free retest of the next build.

Baked-in root passwords, service accounts, private keys and API tokens are the single most common firmware finding. When the same key ships in every unit, extracting it from one device compromises the entire product line, including the cloud services it authenticates to.

Updates that are unsigned, verified with a weak or hardcoded key, or delivered over plain HTTP let an attacker push malicious firmware. Combined with a missing rollback protection, this is how a single compromise becomes persistent across a fleet. We test the whole chain, from how the update is fetched to how it is verified and applied.

Firmware routinely ships an ancient Linux kernel, an outdated OpenSSL, or a BusyBox riddled with known issues. Our SBOM and CVE matching shows exactly which third-party components are exposed and which vulnerabilities are actually reachable on your device, so you patch what matters instead of everything.

Web interfaces and network daemons written in C tend to pass user input into shell commands or copy it without bounds checks. We find the command injection that yields a root shell and the buffer overflow that crashes or hijacks a service, then show the exact input that triggers it.

Firmware often rolls its own crypto or misuses a good library: a static initialisation vector, an ECB-mode cipher, a home-made obfuscation scheme mistaken for encryption, or keys stored in plain flash next to the data they protect. We check how the device generates, stores and uses its keys, because cryptography that only looks strong is one of the more dangerous findings, since teams tend to trust it.

Development conveniences have a way of surviving into production: hidden administrative accounts, undocumented diagnostic services, and Telnet or debug shells left listening. Whether deliberate or accidental, these are a direct route in, and they are easy to miss without reading the actual firmware.

ETSI EN 303 645 sets consumer-IoT expectations around secure update, no default passwords and protected software integrity, all of which live in firmware. The EU Cyber Resilience Act pushes secure development, vulnerability handling and a software bill of materials into a legal requirement for products sold in Europe, and our SBOM and findings map to it directly.

For industrial and OT devices, IEC 62443-4-1 covers the secure development lifecycle and 4-2 the component requirements, both of which your firmware evidence must support. We structure the report so it slots into that documentation.

For any web or network services in the firmware we reference the OWASP Top 10 and established memory-safety guidance, giving your developers a common language for each fix and a clear priority order.