Frontier models can now execute multistage attacks end to end, collapsing the window defenders have between initial access and encryption and narrowing what "protected" means to a short, defensible list: true immutability, a vault outside the production identity domain, genuine air-gap, and a tested recovery path. Cohesity's Security portfolio turns the backup estate into an active line of cyber defense: FortKnox (immutable, air-gapped cyber vaulting), Threat Defense (AI-powered threat detection), Data Security Posture Management (DSPM), powered by Cyera, Data Classification, and Identity Resilience, built with Semperis.