Why Visibility Gaps Fuel Lateral Movement Risk

Illumio's Andrew Rubin on Containing Breaches Through Faster Threat Detection Matthew Perry • November 28, 2025

More tools, more data and more spending haven't translated into fewer breaches - just bigger ones. Andrew Rubin, founder and CEO of Illumio, said the real problem isn't dwell time itself, but the industry's failure to detect and contain threats early. Modern breaches aren't caught in days or weeks; they often persist for months, wreaking financial and operational havoc.

Security leaders, Rubin said, must rethink the perimeter model and address the attack surface inside the environment. Traditional defenses aim to keep threats out, but lateral movement allows attackers to escalate damage once inside. Observability, especially at the network level, plays a critical role in detecting threats before they spread.

"If they can't move laterally, the amount of damage they can inflict is solely contained to that one resource," Rubin said ...