config.xml is a Notepad++ settings file that stores configuration and preference data. It can define editor behavior, user preferences, and other local options that shape how the application runs. Because it is XML-based and writable by the user, it may be loaded automatically at startup and treated as trusted input by the application.
In cyber security, that trust matters. If an attacker can modify or replace config.xml, they may be able to influence application behavior, change command definitions, or trigger unsafe processing in the software that reads it. This makes the file relevant for both attack and defense: attackers look for writable configuration paths, while defenders monitor for unexpected changes, protect user profile directories, and verify that settings files are not being used to smuggle executable actions into a trusted desktop tool.