The world of cybersecurity is experiencing an earthquake. On April 7, 2026, Anthropic released the results of its latest artificial intelligence model, Claude Mythos, revealing an unprecedented capability: the automated discovery and exploitation of thousands of zero-day vulnerabilities in major computer systems. According to The Register, the model identified flaws in software considered secure for over 27 years, vulnerabilities that armies of human researchers had never detected. Anthropic made the decision not to release the model publicly "because it would break the Internet - in the wrong way," in their own words.
The technical details, published on the site red.anthropic.com on April 7, are dizzying. The team of Nicholas Carlini, Newton Cheng, and about a dozen researchers documented Mythos's ability to analyze source code, identify vulnerability patterns invisible to the human eye, and generate functional exploit proofs-of-concept (PoCs) in minutes. The model discovered flaws in operating systems, web servers, communication protocols, and financial infrastructures. The Hacker News reports that "thousands of zero-day vulnerabilities have been identified across major systems" - a number that sends chills down the spines of global IT security officials.
The reaction from authorities was immediate. According to TechXplore (April 10, 2026), the CEOs of the largest American banks held an emergency meeting with Federal Reserve Chairman Jerome Powell and Treasury Secretary Scott Bessent to assess the security implications of this discovery. The financial sector, which relies on aging computer systems (the famous 'legacy systems'), is particularly vulnerable. The central question: if an AI can find these flaws, can hostile state actors do the same?
For the infosec community, Mythos represents a paradigm shift. For years, the number one existential threat was quantum computing, capable of breaking classical encryption. Now, AI is becoming the "new Big Bad," as The Register puts it. Anthropic finds itself in a paradoxical position: the company has created a potentially revolutionary defense tool, but one that could become the most dangerous offensive weapon ever conceived if it falls into the wrong hands. The decision not to release it publicly is welcomed by experts, but raises questions about AI governance in security matters.
The geopolitical implications are considerable. If a commercial AI model can identify thousands of zero-days, the intelligence services of major powers—the United States, China, Russia—are likely developing similar, if not superior, capabilities in secret. The Pentagon declined to comment, but sources within the Department of Defense confirmed to CNN that "active discussions" were underway regarding the integration of similar technologies into U.S. cyber defense. The era of cybersecurity as we knew it may be over.
