Rumor: Ubisoft Just Lost 900GB of Data in Massive ‘MongoBleed’ Hack

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I’ve been covering Ubisoft for years now, and honestly? I’ve never seen the company in quite this much chaos. We’re talking about a publisher that brought us Assassin’s Creed, Far Cry, and Rainbow Six—franchises that basically defined open-world gaming for an entire generation. But here we are at the end of 2025, and the Ubisoft data breach has left Rainbow Six Siege servers down, players experienced what amounted to an R6 Siege free credits hack, and the aftermath has Ubisoft servers offline while teams scramble to contain the damage. Add lawsuits questioning whether gamers actually own their games and a major Chinese investment reshaping how the company operates, and you’ve got a perfect storm of controversy surrounding one of gaming’s most influential publishers.

Ubisoft may be in serious trouble. All upcoming Ubisoft games could be leaked very soon if recent reports are true: 🤯

🟢 Hackers have allegedly exfiltrated the source code for all Ubisoft products from the 1990s to the present day, including games, Uplay, and more.
🟢 For 48… pic.twitter.com/79YRBTgWlS

— Zephryss⛩️ (@TheRealZephryss) December 28, 2025

Let me walk you through everything happening with the Ubisoft hack and beyond—because if you’re a gamer who’s touched any of their titles, this stuff directly affects you.

Key Takeaways:

• Ubisoft just suffered a massive data breach affecting Rainbow Six Siege, with hackers exploiting the MongoBleed vulnerability to steal source code dating back to the 1990s
• Tencent completed a €1.16 billion investment in Ubisoft’s new Vantage Studios subsidiary, gaining 26% economic interest in the company’s flagship franchises
• The company faces ongoing lawsuits over The Crew shutdown, raising fundamental questions about game ownership in the digital age
• Former executives are on trial in Paris for sexual harassment and workplace bullying allegations
• Despite controversies, Assassin’s Creed remains one of gaming’s most successful franchises with over 155 million units sold

What Is Ubisoft and Why Should You Care?

Picture this: it’s 1986, and five brothers in northwest France decide to start a small software distribution business. Fast forward nearly four decades, and that tiny company has become one of the world’s largest video game publishers. Ubisoft isn’t just some random developer—they’re responsible for franchises that have collectively sold hundreds of millions of copies worldwide.

The numbers are staggering. Assassin’s Creed alone has moved over 155 million units with roughly the same number of unique players. Just Dance has surpassed 80 million units. The Tom Clancy umbrella of games—Rainbow Six, The Division, Splinter Cell, Ghost Recon—has created an entire universe of tactical shooters that gamers keep returning to year after year.

But here’s where things get complicated. Ubisoft isn’t just a game company anymore. They’ve become a lightning rod for almost every major controversy in gaming: live-service game shutdowns, game ownership debates, workplace misconduct allegations, and now one of the most significant security breaches in gaming history.

The Rainbow Six Siege Hack: What Actually Happened

On December 27th, 2025, Rainbow Six Siege players logged in to find something absolutely wild: their accounts had been credited with approximately 2 billion R6 Credits. Every cosmetic item in the game—including developer-only skins—was suddenly unlocked. And then the fake ban messages started flooding the ticker. The Ubisoft hack had begun, and it was unlike anything the community had ever seen.

I wish I could tell you this was just some elaborate prank. It wasn’t. The Rainbow Six Siege servers down situation quickly escalated from confusion to full-blown crisis.

According to security research group VX-Underground, at least four separate hacker groups targeted Ubisoft simultaneously, each with different objectives. The first group focused on the Rainbow Six Siege live service itself, manipulating bans, inventories, and distributing what amounted to roughly $13.3 million worth of in-game currency per player. Reports suggest the total value of distributed currency across the entire player base reached a staggering 339 trillion.

But the second group allegedly went much deeper. They exploited a recently disclosed MongoDB vulnerability called “MongoBleed” (tracked as CVE-2025-14847) to pivot into Ubisoft’s internal Git repositories. The claim? They exfiltrated source code for “basically every single Ubisoft product dating back to the 90s”—roughly 900 gigabytes of proprietary data.

Understanding Ubisoft’s MongoBleed Vulnerability Crisis

Let me break down the technical side without putting you to sleep. MongoBleed is a high-severity vulnerability that affects how MongoDB handles compressed network messages. Attackers can send specially crafted packets that cause the database to leak chunks of uninitialized heap memory—potentially exposing credentials, authentication keys, and other sensitive data.

The vulnerability carries a CVSS score of 8.7, which in cybersecurity terms means “really, really bad.” What makes it particularly nasty is that it requires no authentication to exploit. If your MongoDB server is reachable over the network and zlib compression is enabled, you’re vulnerable.

According to Censys, over 87,000 MongoDB instances are currently exposed on the public internet, with nearly 20,000 in the United States alone. Wiz’s telemetry data shows that 42% of cloud environments have at least one vulnerable MongoDB instance. The public exploit was released on December 26th, 2025, and active exploitation in the wild was reported shortly after.

For Ubisoft, this vulnerability reportedly allowed attackers to access internal systems, pivot to code repositories, and potentially compromise the foundation of their entire game development infrastructure. If the source code claims are accurate, cheat developers now have blueprints that could fuel aimbots, ESP hacks, godmode exploits, and anti-cheat bypasses for years to come.

Ubisoft’s Response and Server Shutdown

With Ubisoft servers offline and the R6 Siege free credits hack spreading chaos across the player base, the company officially confirmed the incident and intentionally took Rainbow Six Siege servers down along with the in-game Marketplace. In a follow-up update, the company clarified that players wouldn’t be punished for spending the erroneously granted credits, but all transactions since 11:00 AM UTC on December 27th would be rolled back.

Here’s the silver lining in all this Ubisoft data breach chaos: based on current intelligence, the threat actors responsible don’t appear to have targeted user personal information. Credit card numbers, passwords, and personal addresses seem safe. The attackers apparently focused on humiliating Ubisoft and dismantling the game environment rather than identity theft.

That said, if you’re a Rainbow Six Siege player, enabling two-factor authentication once servers stabilize is still a smart move. When it comes to gaming builds and setups, exploring early access games like Cloudheim might keep you busy while Siege sorts itself out.

The Tencent Investment: Does China Own Ubisoft?

This is one of the most misunderstood aspects of Ubisoft’s current situation. No, China doesn’t own Ubisoft. The Guillemot family—the five brothers who founded the company—still maintains control. But Tencent’s involvement has grown significantly.

In November 2025, Chinese tech giant Tencent completed a €1.16 billion investment in Vantage Studios, a newly created subsidiary. This gives Tencent a 26.32% economic interest in Vantage, which now oversees development of the company’s three flagship franchises: Assassin’s Creed, Far Cry, and Rainbow Six.

The deal values Vantage Studios at a pre-money enterprise value of €3.8 billion. For context, Tencent also holds approximately 9.6% of the company’s overall shares—a stake they’ve maintained since earlier investments. But here’s the important distinction: Tencent is a minority shareholder with limited voting rights under agreements that prevent a hostile takeover.

CEO Yves Guillemot called the transaction “a pivotal milestone in the company’s ongoing transformation,” noting that the investment significantly strengthens the balance sheet while crystallizing the value of their world-class intellectual property.

Why Is Ubisoft Being Sued?

The lawsuits touch on something that should concern every gamer: do you actually own the games you buy?

In 2024, the company shut down the servers for The Crew, a 2014 online-only racing game. The problem? Once those servers went offline, the game became completely unplayable—even for people who bought physical discs. Two California gamers filed a class action lawsuit arguing that customers were misled into believing they were purchasing the game when they were actually only receiving a limited license.

The defense is… interesting, to say the least. Their lawyers argue that players “received the benefit of their bargain and cannot complain now that they were deceived.” The company maintains that The Crew’s packaging clearly disclosed both the internet connection requirement and the right to revoke access with 30-day notice.

The plaintiffs fired back with an amended complaint in March 2025, pointing out that The Crew’s activation code doesn’t expire until 2099—implying the game should remain playable until then. They also argue that the game’s virtual currency could be considered equivalent to gift certificates, which cannot expire under California law.

This case could set a major precedent for digital game ownership. If Ubisoft wins, it reinforces that publishers can shut down any online-only game whenever they want. If the plaintiffs win, it could force the entire industry to rethink how they handle game preservation and server shutdowns.

The Workplace Scandal: Executives on Trial

In March 2025, three former executives went on trial in Paris over allegations of sexual harassment and workplace bullying. The case stems from a 2020 investigative report by French newspaper Libération that exposed a toxic workplace culture at the company.

The allegations are serious. One former executive has been accused of playing pornographic content during a meeting with a female subordinate, regularly using derogatory language about female employees’ appearances, and pestering interns via text messages.

The Solidaires Informatique union, which represents French video game workers, has called for CEO Yves Guillemot and long-time HR executive Marie Derain to also stand trial for alleged complicity in the toxic behavior. The union argues that systemic issues at the company enabled the misconduct to continue unchecked.

This trial represents broader accountability questions in the gaming industry, coming years after similar allegations rocked Activision Blizzard.

Ubisoft’s Biggest Games and Franchises

Despite all the controversy, the game library remains impressive. Their franchises have defined entire genres and continue to attract millions of players worldwide.

Assassin’s Creed stands as their crown jewel with over 155 million units sold. The franchise has evolved from the rooftop parkour of Renaissance Italy to the mythology-infused open worlds of Origins, Odyssey, and Valhalla. Assassin’s Creed Shadows, released in early 2025, continued the series despite pre-release controversy.

Far Cry carved out the open-world shooter genre with its exotic locations and memorable villains. From Vaas in Far Cry 3 to Giancarlo Esposito’s Anton Castillo in Far Cry 6, the series has delivered some of gaming’s most iconic antagonists.

Rainbow Six Siege became a competitive esports phenomenon, maintaining tens of millions of registered players nearly a decade after launch. The tactical shooter’s continued evolution through seasonal updates kept it relevant—until the recent breach threw everything into chaos.

Just Dance might seem like the outlier, but with over 80 million units sold, it’s proven that gaming isn’t just about shooting and climbing. The franchise has become a party staple worldwide.

Watch Dogs brought hacking into mainstream gaming, letting players control San Francisco’s infrastructure while exploring surveillance culture themes. The series showcases Ubisoft’s willingness to tackle contemporary issues.

Is Ubisoft LGBTQ-Supportive?

The company publicly supports LGBTQIA+ inclusion both in workplace policies and game content. They operate UbiProud, a global employee resource group for LGBTQIA+ employees and allies. In 2023, a three-year roadmap was announced specifically focused on LGBTQIA+ support, covering HR policies, training, awareness, and representation in games.

Their games feature LGBTQ+ characters across multiple franchises. Far Cry 6 includes characters like Paolo de la Vega and Rosa Mel, developed with input from LGBTQ+ consultants and employee resource groups. Rainbow Six Siege has introduced operators with diverse backgrounds and identities. The Division 2 includes characters like Faye Lau in prominent narrative roles.

This commitment has drawn both praise from inclusion advocates and criticism from some player communities. The tension reflects broader cultural debates about representation in gaming.

Who Is the Biggest Gaming Company?

To put the company in perspective, let’s look at where they stand in the industry hierarchy. As of 2025, Sony Interactive Entertainment leads the pack with approximately $31.7 billion in annual gaming revenue, powered by PlayStation hardware and first-party titles.

Tencent follows closely at $27.3 billion, driven by mobile juggernauts like Honor of Kings and PUBG Mobile plus their investments in studios worldwide. Microsoft Gaming comes in third at roughly $23.5 billion, bolstered by Xbox Game Pass and the Activision Blizzard acquisition.

Ubisoft, while influential, ranks considerably lower on revenue charts. The company’s struggles with game delays, studio closures, and financial pressures have impacted their standing. Their workforce decreased from over 19,000 employees to approximately 17,782 by March 2025.

For gamers exploring titles from top publishers, checking out comprehensive guides for games like Arc Raiders can help maximize your gaming experience across different studios.

Who Owns 40% of Fortnite?

Since we’re discussing Tencent’s gaming investments, this question comes up constantly. Tencent owns approximately 40% of Epic Games, the company behind Fortnite. Tim Sweeney, Epic’s founder and CEO, maintains the controlling stake at around 41.4%.

Other Epic shareholders include Disney at 10% (following a $1.5 billion investment in 2024), Sony at 5.4%, and Kirkbi (The LEGO Group’s parent company) at 3.2%. The Tencent investment dates back to 2012, when the Chinese company acquired their stake for $330 million—a deal that looks incredibly prescient given Fortnite’s subsequent success generating over $20 billion in lifetime revenue.

Tencent’s gaming portfolio extends far beyond Epic. They fully own Riot Games (League of Legends), hold majority stakes in Supercell (Clash of Clans), and have significant positions in Activision Blizzard, Ubisoft, and PUBG Studios parent company Krafton. When it comes to mastering games from Tencent-affiliated studios, resources like throwable guides and weapon guides prove invaluable.

What Happens Next for Ubisoft?

The company faces a critical crossroads. The Tencent investment provides financial stability, but questions remain about creative direction and independence. The Rainbow Six Siege breach exposed serious infrastructure vulnerabilities that could take months to fully address. Legal battles over game ownership continue to wind through courts with potentially industry-shaping implications.

Vantage Studios, the new subsidiary managing their flagship franchises, represents a significant organizational shift. Led by co-CEOs Charlie Guillemot (son of Yves) and Christophe Derennes, the studio is built on principles of “autonomy, focus, and player centricity.” Whether this structure enables better games or just creates more corporate complexity remains to be seen.

The company’s upcoming slate includes Rainbow Six Mobile launching in February 2026, continued support for Assassin’s Creed Shadows, and rumors of new entries in the Splinter Cell and Far Cry franchises. They’ve also acquired March of Giants from Amazon Game Studios and continue developing various mobile titles.

My Honest Take on Ubisoft

I’ve played their games since the original Prince of Persia, and honestly, my relationship with this company is complicated. They’ve created some of gaming’s most memorable experiences—climbing my first synchronization point in Assassin’s Creed II remains one of my favorite gaming memories.

But I can’t ignore the pattern of problems. The workplace culture issues were genuinely disturbing. The Crew shutdown felt like a betrayal to dedicated players. The security breach raises serious questions about data protection. And the constant push toward live-service models often comes at the expense of polished, complete games.

That said, writing off Ubisoft entirely would be premature. The Tencent investment might provide the stability needed to focus on quality over quantity. The new subsidiary structure could allow their best franchises to flourish under dedicated leadership. And sometimes companies need to hit rock bottom before they can rebuild properly.

For now, I’m cautiously watching. If Rainbow Six Siege comes back online without major issues and the company addresses the legitimate concerns players have raised, there’s a path forward. If they double down on defensive corporate speak while ignoring community feedback, we’ll know exactly where their priorities lie.

Frequently Asked Questions About Ubisoft

What is Ubisoft known for?

Ubisoft is known for developing and publishing some of gaming’s most iconic franchises, including Assassin’s Creed, Far Cry, Rainbow Six, Watch Dogs, Just Dance, and Prince of Persia. Founded in 1986 in France by the Guillemot brothers, the company has grown into one of the world’s largest gaming publishers with over 155 million Assassin’s Creed units sold globally.

What kind of company is Ubisoft?

Ubisoft is a French multinational video game company headquartered in Saint-Mandé, France. It operates as both a game developer and publisher, creating games through its numerous internal studios worldwide—including locations in Montreal, Quebec, Barcelona, and Sofia—while also publishing third-party titles. The company specializes in AAA game development across PC, console, and mobile platforms.

Why is Ubisoft being sued?

Ubisoft faces a class action lawsuit from California gamers over the shutdown of The Crew in March 2024. The plaintiffs argue Ubisoft misled customers into believing they owned the game when they actually only purchased a license that could be revoked. Ubisoft’s defense maintains that the game’s packaging clearly disclosed server requirements and the company’s right to revoke access with 30-day notice.

Does China own Ubisoft?

No, China does not own Ubisoft. The Guillemot family (the founders) maintains control of the company. However, Chinese tech giant Tencent holds approximately 9.6% of Ubisoft shares and recently completed a €1.16 billion investment for a 26.32% stake in Vantage Studios, a new subsidiary managing Assassin’s Creed, Far Cry, and Rainbow Six franchises. Tencent’s agreements prevent a hostile takeover.

Is Ubisoft LGBTQ?

Ubisoft publicly supports LGBTQIA+ inclusion both in its workplace and games. The company operates UbiProud, a global employee resource group for LGBTQIA+ employees, and has implemented a three-year diversity and inclusion roadmap. Their games feature LGBTQ+ characters in titles like Far Cry 6, Rainbow Six Siege, and The Division 2, developed with input from cultural consultants and employee resource groups.

Who is the #1 gaming company?

As of 2025, Sony Interactive Entertainment is the world’s largest gaming company by revenue with approximately $31.7 billion in annual gaming revenue, powered by PlayStation hardware and first-party titles like Helldivers 2. Tencent ranks second at $27.3 billion, followed by Microsoft Gaming at $23.5 billion. Ubisoft ranks considerably lower on this list.

Who owns 40% of Fortnite?

Tencent owns approximately 40% of Epic Games, the company behind Fortnite. Tim Sweeney, Epic’s founder and CEO, maintains the controlling stake at around 41.4%. Other shareholders include Disney (10%), Sony (5.4%), and Kirkbi (The LEGO Group’s parent company) at 3.2%. The Tencent investment dates back to 2012.

What is Ubisoft’s biggest game?

Assassin’s Creed is Ubisoft’s biggest and most successful franchise, with over 155 million units sold and 155 million unique players globally. The franchise has spanned numerous entries since 2007, exploring historical periods from Ancient Egypt to feudal Japan. Just Dance ranks second with over 80 million units sold, followed by Far Cry and the Tom Clancy series.