Hacker Yuki Chen Joins AI Firm Z.ai After Exposing 23 Windows Vulnerabilities

Yuki Chen, described as a Chinese 'superstar' hacker, has joined the AI company Z.ai. He announced the move last week in a social media post, writing: "New journey, new mission!" and expressing gratitude for the chance to "help build a safer cyberspace with the power of frontier AI." Before the appointment, Chen used Z.ai's flagship GLM models to identify 23 cyber vulnerabilities in Microsoft's Windows operating system. The disclosure links the company's language models to practical security research rather than general-purpose tasks. Chen's public statement frames the new role around frontier AI and cybersecurity, positioning the hire as part of Z.ai's push into safety-related applications. Neither the exact date of his start nor the specific scope of his responsibilities at Z.ai was disclosed in the source material. The recruitment follows a period in which Chinese AI developers have emphasized model capability alongside security concerns, and it places a well-known security researcher inside one of the country's AI leaders.