What is Mythos — and why does it matter right now?

Attackers still need to move laterally inside a network to do real damage. That step — moving from one system to another — is what turns a breach into a business disaster. If you stop lateral movement, you stop the attack from spreading.

Does Mythos mean traditional defenses no longer work?

Traditional defenses like patching and prevention still matter — but they're no longer enough on their own. AI compresses the time between vulnerability discovery and exploitation. That means patch cycles and detection tools can't keep up. Organizations must assume a breach will happen and focus on limiting the impact.

What doesn't change, even in a Mythos world?

Attackers still need to move laterally inside a network to do real damage. That step — moving from one system to another — is what turns a breach into a business disaster. If you stop lateral movement, you stop the attack from spreading.

What is the right strategy to defend against Mythos-era attacks?

The priority shifts from prevention to containment. You can't stop every breach, but you can design your environment so any breach stays small, isolated, and manageable. This means removing implicit trust, enforcing least privilege, and controlling how systems communicate.

How does Illumio help organizations prepare for Mythos?

Illumio limits how far an attacker can move once inside the network. Its segmentation controls are vulnerability-agnostic — they work regardless of how the attacker gets in. Combined with real-time visibility, this approach turns inevitable compromise into contained incidents instead of enterprise-wide breaches.

Think AI Can Save You From AI-Fueled Attacks?
Time for Some Mythos-Busting.

Defenders need AI. But Anthropic Mythos proves you’ll never win an AI arms race. The answer a strategic shift from prevention to breach containment.

Map your attack paths — free trial

The data is in. The threat has changed.

31%

For the first time nearly two decades, exploits are the top breach vector, accounting for nearly a third of successful attacks. (Verizon DBIR)

43 days

The median time to patch rose more than a third to 43 days. AI-assisted attackers can weaponize disclosed flaws within hours. (Verizon DBIR)

-7 days

The mean time to exploit has gone negative. Attackers can weaponize vulnerabilities a week before a patch even exists. (Google Mandiant)

You can’t patch faster than AI can exploit. But you can stop the spread and contain the damage.

Assume breach. AI-powered attacks will get past your perimeter. Containment starts with accepting that reality and designing your architecture around it.
Map your environment. Illumio maps every workload, application, and connection across your hybrid environment — in real time, even as your environment changes.
Surface hidden risk. Illumio Insights uses an AI security graph to expose the pathways attackers exploit — before Mythos-class AI models can find them .
Contain instantly. When a breach hits, policy is enforced automatically. Isolate compromised workloads, cut lateral movement, and shrink the blast radius. No network changes. No downtime.

One platform. Every environment.
Built for the Mythos Era.

Illumio gives you the visibility and control you need to reduce risk and stop AI-powered threats — without overhauling your environment.

Find the risk before attackers do.

Mythos-class models map networks and chain exploits, finding the paths defenders overlook. Illumio does the same thing — for you. An AI security graph maps every workload, link, and dependency across your hybrid environment, surfacing the high-risk pathways that attackers target first.

Cut off the attack paths they need.

An exploit chain is only as valuable as the lateral movement it enables. Illumio enforces granular policy across your data center and cloud to eliminate unnecessary pathways between workloads. No open ports. No overprivileged connections. No network changes required.

Contain the breach at machine speed.

When patching takes weeks and AI exploitation takes hours, response speed is everything. Illumio contains breaches in seconds — isolating compromised workloads, blocking lateral movement, and shrinking the blast radius to a single point. When the attack lands, it has nowhere to go.

The Illumio difference

The only platform built for breach containment. Illumio delivers the visibility and control your you need to contain breaches at scale. Turn lateral movement into a dead end with real-time observability, instant containment, and unified protection across every environment.

Protect critical assets

Protect the most important data and applications with the leader in segmentation.

Magnifying with a checked checkbox in it, with a warning sign in front of it signifying an attacker being caught

Stop ransomware spread

Block ransomware from propagating within your customer environment without touching their network.

Prevent lateral movement

Proactively prevent lateral movement between devices, leaving ransomware and other attacks with nowhere to go.

Gain continuous visibility

Secure distributed environments with critical visibility into device traffic on or off the corporate network.

Meet compliance demands

Comply with cyber insurance carriers’ requirements for implementing segmentation.

Segment anywhere

Proactively prevent lateral movement between devices, leaving ransomware and other attacks with nowhere to go.

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What is Mythos

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Mythos and Illumio

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Mythos Glossary and FAQs

Mythos Fact Sheet

Before Mythos, defenders asked: What's vulnerable? Is it patched? Did an alert fire? What matters now: What's reachable from a foothold? How far can an attacker move? How fast can you contain the blast radius?

Download the fact sheet to see what Mythos changes, the control gaps it exposes, and how breach containment answers each one.

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Mythos: Time to Rewrite the Entire Cybersecurity Model

The math of cybersecurity was always bad: defenders must be right every time, attackers only once. But the fight was fair because both sides moved at human speed.

Mythos ended that balance. When attackers operate at machine speed and defenders still patch, process, and procure at human speed, prevention alone can't hold.

Illumio Founder and CEO Andrew Rubin argues that this isn't an incremental shift — it's the end of the current cybersecurity model. And the new mission is resilience.

Read now

The Mythos Readiness Checklist

Mythos-class threats are here. The window to prepare is still open — but it won't stay open long.

This step-by-step readiness checklist gives your team concrete actions you can take today: assess your risk, block high-risk ports, gain visibility into network traffic, and harden your environment before AI-driven attacks arrive.

Read now