A recent incident involving Anthropic's Mythos Preview model has highlighted the rapidly diminishing window for patching zero-day vulnerabilities. The model autonomously discovered and exploited previously unknown flaws in major operating systems and browsers, prompting Anthropic to restrict its access. This capability is expected to become more widespread in the coming weeks or months, according to Palo Alto Networks' Wendi Whitmore1. The average time for eCrime actors to break out is already a mere 29 minutes, as reported by CrowdStrike's 2026 Global Threat Report. This underscores the urgent need for organizations to assess their exposure to zero-day attacks and prioritize patching. The fact that zero-day activity is now targeting advanced models like Anthropic's means that patching windows are closing fast, making it crucial for practitioners to take immediate action to protect their systems.