Arm architecture is a CPU design used widely in phones, tablets, embedded systems, routers, and other low-power devices. It focuses on energy efficiency and compact hardware, which is why it often powers devices that must run quietly, stay cool, or last a long time on battery.
In cyber security, Arm matters because attackers and defenders both target the platforms that use it. Malware may be compiled specifically for Arm, or it may rely on translation and compatibility layers to run software written for another CPU family. Defenders also need to account for Arm-specific binaries, firmware, and system behavior when scanning for vulnerabilities, verifying updates, or hardening devices. As more consumer and enterprise systems adopt Arm, security teams must treat it as a first-class platform with its own attack surface, tooling, and patching requirements.