Microsoft have responded to the Xbox 360 firmware hack reported on here.

The hacker, who goes by the name of Commodore4eva, claimed that the firmware mod allows you to boot all Xtreme Xbox 360 backups,all Xbox 1 backups, all Xbox 360 originals, and all Xbox 1 originals on Xbox 360.

Microsoft's statement reads, The core security system has not been broken. However, on some Xbox 360 consoles the authentication protocol between the optical disc drive and the console may be attacked via a complex software and hardware modification which could allow people to play illegally copied and modified games. We continue to invest in the security of the platform and will respond appropriately as unauthorized activity is identified. When a person purchases a genuine Microsoft Xbox360 console and genuine Xbox 360 games, they receive the real product which is complete and suited for the use intended. They know its source and can expect the console and games to function properly and provide a satisfying gaming experience. Genuine and unmodified Microsoft Xbox products provide gamers with the reliability, security, support and dynamic gaming experience that they expect, and genuine and unmodified Microsoft Xbox 360 products are eligible for technical support. If there are any questions regarding the use and enjoyment of the Xbox 360 console, the Xbox Live service, or Xbox 360 games, gamers can be assured that Microsoft will stand by its product and provide the necessary support. Modified consoles will not be eligible for technical support and the user’s warranty will be voided. Lastly, the protection of intellectual property rights is a high priority for Microsoft and our partners, one that significantly and positively impacts economic growth, technological innovation, and most importantly, the confidence of customers who count on the integrity and quality of their products.

Source: Xbox.com