Ubisoft Halts Rainbow Six Siege Service After $13.33 Million Security Breach
Written by Ohris M. Greyoon, Blockchain & Crypto Expert
Source: Coinmarketcap
Updated: Dec 29 2025- Security Breach Impact: Ubisoft was forced to halt Rainbow Six Siege services due to a security breach that allowed hackers to distribute up to 2 billion R6 Credits, resulting in an estimated loss of $13.33 million, significantly disrupting normal game operations and player experience.
- Market Response: The incident led Ubisoft to shut down all servers and the marketplace, initiating a rollback plan to reverse transactions manipulated by hackers, highlighting the company's urgency in maintaining user trust and game security.
- User Impact: Ubisoft pledged not to ban accounts for spending unauthorized credits, aiming to alleviate negative sentiment among players while ensuring comprehensive quality control tests post-rollback to restore account integrity.
- Technical Challenges: The security incident was linked to a MongoBleed vulnerability, with Ubisoft conducting a two-week investigation and remediation, emphasizing the complexities of rollbacks in decentralized technologies that could affect overall user and system security.
About the author
Ohris M. Greyoon
Ohris M. Greyoon holds a Master’s in Computer Science from MIT and has 10 years of experience in blockchain technology and cryptocurrency markets. A pioneer in decentralized finance (DeFi) analysis, he leads Intellectia’s Crypto News, offering cutting-edge insights into digital assets.
