Exfiltrate, in cybersecurity, refers to the unauthorized transfer or theft of data from a victim’s network or system to an external location controlled by attackers. This process is often the final stage of a cyberattack, where sensitive information such as intellectual property, credentials, or personal data is stealthily moved outside the organization’s perimeter. Attackers may use various techniques to avoid detection, including encryption, covert channels, or disguising the data as legitimate traffic. Exfiltration can have severe consequences for organizations, including financial loss, reputational damage, and regulatory penalties. Effective monitoring and security controls are essential to detect and prevent data exfiltration attempts.