Assessing Claude Mythos Preview’s cybersecurity capabilities

Frontier Red Team details Claude Mythos Preview's emergent capability to autonomously find and weaponize large numbers of vulnerabilities—including zero-days and N-day exploits—against major operating systems, browsers, cryptographic libraries, and virtual machine monitors; the report includes multiple technical case studies (OpenBSD TCP SACK crash, FreeBSD NFS RCE, Linux privilege escalations, browser JIT heap sprays), cryptographic commitments for withheld disclosures, and guidance for defenders and coordinated disclosure.