Over the course of the past several days, the FBI, CISA, and ODNI have become aware of a significant and ongoing cybersecurity campaign. Pursuant to Presidential Policy Directive (PPD) 41, the FBI, CISA, and ODNI have formed a Cyber Unified Coordination Group (UCG) to coordinate a whole-of-government response to this significant cyber incident. The UCG is intended to unify the individual efforts of these agencies as they focus on their separate responsibilities. This is a developing situation, and while we continue to work to understand the full extent of this campaign, we know this compromise has affected networks within the federal government.