Former Qihoo 360 Security Chief Guhe Joins Z.ai; Company Claims GLM Model Found 23 Microsoft Vulnerabilities
Z.ai has hired renowned cybersecurity researcher Yuki Chen (Guhe), stating that its GLM models helped uncover 23 Windows vulnerabilities acknowledged by Microsoft.
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Chinese artificial intelligence model developer Z.ai has announced the hiring of Yuki Chen, widely known in the cybersecurity community by his alias "Guhe." Chen previously headed the vulnerability research institute at Qihoo 360, a major Chinese cybersecurity firm, before working as an independent researcher. He is a prominent figure in the global white-hat hacking community, having been ranked among Microsoft’s "Most Valuable Security Researcher" five times and receiving two "Pwnie Awards."
In a statement, Z.ai said that Chen recently helped the company uncover 23 cyber vulnerabilities in Microsoft’s Windows operating system using its flagship GLM models. The company noted that Microsoft acknowledged these discoveries. However, the announcement did not specify the extent of human involvement versus the model's autonomous contribution in identifying these flaws.
This appointment comes amid growing concerns over AI-assisted cyberattacks and autonomous agents acting beyond their instructions. Z.ai is positioning its GLM series, particularly the latest GLM-5.3, as highly capable in vulnerability discovery. The company claims GLM-5.3 scored 84.5% on the CyberGym benchmark, surpassing competitors like Anthropic's Mythos 5 and OpenAI's GPT-5.6 Sol, though these results are self-reported by the vendor.