Report: CISOs Should Prepare for Post-Mythos Exploit Storm

The Cloud Security Alliance (CSA) has published an expedited strategy briefing warning CISOs about an impending 'AI vulnerability storm' triggered by Anthropic's Claude Mythos model. Mythos is capable of discovering and exploiting complex, high-severity vulnerabilities across major operating systems and browsers, including a patched 27-year-old OpenBSD flaw. Anthropic launched Project Glasswing, providing Mythos access to organizations like Apple, AWS, and Microsoft with $100M in usage credits and $4M in open source security donations. The CSA paper, co-authored by prominent figures including former CISA director Jen Easterly and cryptographer Bruce Schneier, argues that attackers will gain disproportionate benefit from AI exploitation capabilities, overwhelming current patch cycles. Recommended defenses include hardening basics like MFA and segmentation, robust dependency management, automated security assessments via LLMs, AI agents in security operations, and preparing for increased incident volume and staff burnout.