Remote command access is the ability to send instructions to a compromised system without being physically present. In practice, it means an attacker can run shell commands, change settings, start processes, or pull data from a device over the network after gaining a foothold.
This matters because it turns a single intrusion into ongoing control. Attackers use remote command access to install more malware, create proxy or relay nodes, move laterally, and maintain persistence. Defenders look for signs such as unusual outbound connections, unauthorized logins, unexpected process launches, and command-and-control traffic from systems that should not be interactive. On IoT and embedded devices, this can be especially dangerous because they often have weak monitoring and limited patching, making covert remote control easier to hide.