Executive SummaryOn December 27, 2025, a major security breach impacted Ubisoft's flagship title, Rainbow Six Siege, resulting in the unauthorized distribution of billions of in-game credits and exclusive items to player accounts, as well as the manipulation of moderation systems, including random bans and unban actions. The incident affected both regular and high-profile accounts across PC and console platforms. Ubisoft responded by acknowledging the breach, intentionally shutting down game ser