Hackopedia

23 OT Network Hacks That Were 100% Preventable

The real-world OT breaches that defeated firewalls, air gaps, and VPNs — and what actually would have stopped them.

Why Hackopedia Exists

Over the last decade, 23 high-profile cyberattacks against Operational Technology (OT) and Critical Infrastructure have caused blackouts, plant shutdowns, contaminated water scares, safety system failures, and billions of dollars in economic damage.

From the Ukraine power grid attacks to Triton, Oldsmar, Colonial Pipeline, JBS, Maersk, and beyond, these incidents are often described as inevitable, sophisticated, or the cost of doing business in a connected world. They weren’t.

Every one of these breaches followed a well-known, repeatable pattern:

  • An exposed IT or OT system
  • A stolen or misused credential
  • Implicit trust between networks
  • Lateral movement into operational systems


Hackopedia exists to document those failures — and to show why they were preventable.

Table 1: 23 Critical Infrastructure Incidents Causing Operational Shutdowns
NOTE: (R): Ransomware; (M): Malware; (HoK): Hands-on-Keyboards

The Uncomfortable Truth About OT Security

Most OT environments are not failing because attackers are too advanced.

They are failing because visibility and access still exist where they should not.

Traditional controls like:

  • Firewalls
  • Flat VLANs
  • VPNs
  • “Air gaps”
  • Passive monitoring tools

…do not prevent attackers from seeing, targeting, and reaching OT systems once an initial foothold is gained.

Firewalls inspect traffic.

They do not make systems invisible.

VPNs authenticate users.

They do not prevent reconnaissance or lateral movement.

When these controls fail — as they consistently have — the operational consequences fall on OT teams who trusted architectures that were never designed for safety-critical systems.

From IT Convenience to OT Catastrophe

A recurring theme across these incidents is administrative convenience overriding operational safety. Identity systems shared between IT and OT. Remote access designed for office workers extended into plants. Broad trust granted to vendors, contractors, and third-party software.

In the Colonial Pipeline incident, a single compromised VPN credential on the IT side forced the shutdown of thousands of miles of pipeline — not because OT was encrypted, but because OT could no longer be trusted to remain isolated. In many cases, organizations shut down operations preemptively — not because OT was compromised, but because they had no way to guarantee it wouldn’t be next.

That is not resilience. That is architectural fragility.

The OT Prevention Imperative

The lesson from these 23 incidents is clear:

Detection is not enough. Response is not enough. Recovery is not enough.

Prevention in OT must focus on eliminating the conditions that allow attacks to progress:

Systems must not be discoverable

Access must not be credential-based

Trust must not be implicit

Lateral movement must not be possible

In OT, availability is the primary security outcome.

Any architecture that cannot guarantee continued operation during an IT breach is fundamentally incomplete.

What You’ll Find in Hackopedia

Hackopedia documents 23 real-world Operational Technology (OT) and Critical Infrastructure cyber incidents that resulted in operational disruption, safety risk, or economic damage.

Each incident is analyzed using the same consistent, OT-focused framework:

What was attacked

The specific OT, ICS, safety, or supporting operational systems involved.

How initial access occurred

The real entry point — phishing, stolen credentials, exposed remote access, supply chain compromise, or misconfiguration.

Where trust existed

The implicit assumptions between users, devices, networks, vendors, or systems that attackers exploited.

How lateral movement happened

How attackers moved from IT into OT, from one plant to another, or from monitoring systems into control systems.

Why operations were impacted

The architectural reason production stopped, safety systems were threatened, or services were disrupted.

What architectural control would have stopped it

The specific prevention mechanism — invisibility, identity-defined access, segmentation, or decoupling — that would have blocked the attack before impact.


Each incident has its own dedicated page so you can compare patterns across industries, years, attack types, and failure modes, and understand why these were not isolated events — but predictable outcomes of shared design assumptions.

Why These Attacks Were Preventable

These were not zero-day-driven, unpatchable, unsolvable attacks.

They were enabled by:

  • Exposed network surfaces
  • Static remote access
  • Shared credentials
  • Flat trust models
  • Lack of enforced separation between IT and OT

Modern OT environments require invisibility by default and identity-defined access, not perimeter assumptions.

That is the architectural shift this site is designed to make clear.

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Take the Next Step

Reading about past failures is only useful if it changes future outcomes. If attackers can see your OT network, they can target it. If they can target it, compliance, safety, and uptime are already at risk.

BlastWave eliminates reconnaissance, initial access, and lateral movement — without agents, without downtime, and without changing IPs, protocols, or PLCs.

Secure Your OT Network