Allegedly, hackers gained access to 900 gigabytes of internal Ubisoft data. But there’s more to the story!
First, let’s talk about Rainbow Six Siege. The game went completely offline after attackers distributed billions of in-game currency, causing significant damage. Ubisoft was forced to shut down all Rainbow Six Siege servers after the game was hacked. Shortly after 3 p.m. Saturday, the company tweeted that there had been an incident with the game and reported an unplanned outage on all platforms on its service status page. The French publisher has not acknowledged the cause of the disruption, but numerous reports state that players received 2 billion R6 credits and Renown points, developer-reserved skins, and Glaciers, one of the rarest weapon skins in the game. Additionally, there are reports of random bans and unbans.
Due to the ongoing chaos, players have been advised to stay offline, especially since this appears to be more than just a simple hack. It appears to be a massive security breach that caused Ubisoft to lose control of the game’s backend systems. The company, led by Yves Guillemot, has not yet explained what happened, likely because it is trying to figure out what occurred and how to regain control of the game. However, this silence has frustrated players. Although the extent of the damage is not yet known, it is advisable for anyone with a Ubisoft account, especially those with accounts linked to Rainbow Six Siege, to change their passwords as a precaution. This is one of the first cases in recent memory where an apparent security breach has ruined an entire game.
We’re aware of an incident currently affecting Rainbow Six Siege. Our teams are working on a resolution.
We will share further updates once available.
— Rainbow Six Siege X (@Rainbow6Game) December 27, 2025
We believe this may have been how hackers intruded into Ubisoft’s internal servers. According to unconfirmed reports, approximately 900 GB of Ubisoft’s internal data may have been accessed. The data allegedly includes source codes, internal tools, and development materials for both new and old games. The leaked data reportedly spans several decades, with some materials dating back to titles from the 1990s and others to current projects.
BREAKING: Ubisoft Rainbow Six Siege servers have been breached.
Players are reporting massive amounts of R6 Credits, Renown, Alpha Packs, and exclusive items unexpectedly.
Numerous accounts even Ubisoft, including streamers’ and possibly official ones, have received random or… pic.twitter.com/9hGNbBCMAm
— Pirat_Nation 🔴 (@Pirat_Nation) December 27, 2025
The breach is reportedly linked to a MongoDB vulnerability known as MongoBleed, which may have allowed attackers temporary access to Ubisoft’s internal systems. The company has not officially confirmed the extent of the breach or whether any internal data was stolen. Therefore, these claims should be treated with caution. Four hacker groups were involved in the attack, each acting separately, but they all appear to be connected.
This is certainly a huge embarrassment for Ubisoft at the end of the year!
Source: Tom’s Hardware, Ubisoft, Reddit
