In this week's cybersecurity roundup, Federal Reserve officials met with major US banks to discuss risks posed by Anthropic's powerful new Mythos AI model, which has advanced autonomous hacking capabilities that are currently restricted to select partners. Meanwhile, medical device giant Stryker confirmed a March cyberattack will significantly impact its first-quarter earnings despite restoring operations, and a frustrated researcher publicly released a Windows zero-day exploit called BlueHammer after a dispute with Microsoft over the company's handling of the vulnerability report. Other notable incidents include a hacker claiming to have stolen over 10 petabytes of data from China's National Supercomputing Center and a new Mac stealer malware specifically targeting cryptocurrency holders with over ten thousand dollars in their wallets.