A CLI (command-line interface) binary is an executable program that users run from a terminal, often to manage software, systems, or cloud services. It may read local configuration files, cached access tokens, and other credentials, so it can have access to sensitive data beyond the command it performs.
In an attack, an adversary who compromises a software release channel or publishing account may distribute a malicious CLI binary that appears legitimate. If users install and run it, the program could target credentials or files available to their account; the presence of a malicious payload does not by itself prove data was stolen. Defenders should verify versions and artifact hashes, use trusted release provenance, restrict publishing access, and review endpoint activity and rotate credentials if a suspect binary ran.