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Z.ai's GLM model identified 23 vulnerabilities in the Windows operating system, confirmed by Microsoft's Security Response Center (MSRC). This marks a significant advancement in commercial software security, demonstrating the model's autonomous capability in independent vulnerability discovery. Since the release of GLM-5.2, Z.ai has uncovered over 4,200 vulnerabilities across about 390 open-source projects, with over a thousand categorized as critical to high severity. Z.ai has established a public Security Disclosure Ledger to track its findings through a coordinated disclosure process. The confirmation of vulnerabilities by MSRC is notable due to the rigorous nature of their vulnerability triage operations. Z.ai's GLM-5.3 achieved a score of 84.5% on CyberGym, outperforming competitors like Anthropic's Mythos 5 and OpenAI's GPT-5.6 Sol. Reports indicate that NIST's AI safety division has flagged GLM-5.3 due to concerns about its cyber capabilities, particularly regarding the potential for modified versions to reduce safety features. Z.ai plans to continue targeting commercial software in its efforts.