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AI has compressed vulnerability discovery-to-exploit from months to hours, breaking the traditional patch-management buffer. Anthropic's Claude Mythos Preview found over 10,000 high-severity flaws in one month, with 99% still unpatched. Zero Day Clock reports the 2026 average time-to-exploit is roughly 24 hours, down from 53 days in 2024.

Frontier models like Claude, GPT-4o, and Gemini can now chain low-severity vulnerabilities into critical exploit paths at machine speed with minimal human direction. CVSS scores measure individual severity in isolation and fail to account for AI-assisted chain discovery. Every deferred vulnerability is one AI reconnaissance pass from becoming an incident.
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