Illumio Report Warns: Lateral Movement, Not Breach Entry, Causes the Real Cybersecurity Damage

In most cyberattacks, the real challenge doesn’t begin at the point of entry—it starts afterward. Once cybercriminals infiltrate a system, they move laterally across networks, testing access points, escalating privileges, and expanding control until a small breach becomes a full-scale compromise. Despite decades of technological progress, the core lesson remains: total prevention is impossible, and it’s the spread of an attack that does the deepest damage.

Illumio’s 2025 Global Cloud Detection and Response Report echoes this reality. Although many organizations claim to monitor east-west traffic and hybrid communications, few possess the contextual clarity to interpret the data effectively. Collecting logs and flow metrics is easy; understanding which workloads interact—and whether that interaction poses a risk—is where visibility breaks down.

Illumio founder and CEO Andrew Rubin highlighted this disconnect: “Everybody loves to say that we’ve got a data or a telemetry problem. I actually think that may be the biggest fallacy of all. We have more data and telemetry than we’ve ever had. The problem is we haven’t figured out how to use it in a highly efficient, highly effective way.”

The report revea

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