Claude's Mythos rival: Chinese Cybersecurity Firm claims finding 1000 vulnerabilities

Dev.to / 4/28/2026

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Key Points

A Chinese cybersecurity firm (360 Digital Security Group) claims its multi-agent AI system autonomously found nearly 1,000 vulnerabilities, including a critical Microsoft Office zero-day that allegedly remained dormant for eight years.
The firm’s claims are being compared to Anthropic’s Claude Mythos, suggesting AI-assisted autonomous discovery is spreading beyond Western, tightly controlled research settings.
The report highlights how rapid proliferation of AI-driven vulnerability hunting could accelerate offensive cyber capabilities.
It warns that scaled AI-enabled techniques may increasingly reach nation-state threat actors and increase real-world security risk.

Forensic Summary

Chinese cybersecurity firm 360 Digital Security Group claims its multi-agent AI system autonomously discovered nearly 1,000 vulnerabilities, including a critical Office zero-day allegedly dormant for eight years, drawing direct comparisons to Anthropic's restricted Claude Mythos model. The developments signal that AI-driven autonomous vulnerability discovery is rapidly proliferating beyond tightly controlled Western research environments. This raises significant concerns about AI-accelerated offensive capabilities reaching nation-state threat actors at scale.

Read the full technical deep-dive on Grid the Grey: https://gridthegrey.com/posts/chinese-cybersecurity-firms-ai-hacking-claims-draw-comparisons-to-claude-mythos/