By Eckhart Mehler for CISOsCISO — a perspective on cybersecurity leadership, governance and the decisions that determine whether organizations retain control.

The Perfect Blueprint: Why Digital Twins Have Become a Goldmine for Attackers

For centuries, reconnaissance required physical presence.

An attacker needed to visit a location, observe routines, identify entrances, study security measures and gradually piece together an understanding of the environment.

Digital transformation has fundamentally changed that process.

Increasingly, organizations are creating digital twins of their buildings—virtual representations that mirror physical facilities in extraordinary detail. Originally designed to improve planning, maintenance and operational efficiency, these models have become indispensable for managing modern infrastructure.

They also represent one of the richest intelligence sources an attacker could hope to obtain.

A compromised digital twin is not simply another leaked document.

It is a blueprint of how a building thinks, operates and protects itself.

For CISOs, digital twins should no longer be viewed only as engineering assets.

They are becoming high-value cyber assets.

More Than a 3D Model

Many executives still imagine a digital twin as little more than a three-dimensional visualization.

In reality, modern digital twins integrate enormous volumes of operational information.

Depending on the building, they may include:

• architectural layouts
• structural details
• utility infrastructure
• electrical distribution
• HVAC systems
• sensor locations
• access control zones
• surveillance coverage
• fire protection systems
• occupancy information
• maintenance histories
• asset inventories
• live telemetry
• operational dependencies

Some digital twins even synchronize continuously with real-world sensor data, creating a living representation of the facility.

The more useful the model becomes for operations, the more valuable it becomes for attackers.

Reconnaissance Without Leaving Home

Every sophisticated cyber attack begins with intelligence gathering.

Traditionally, physical infrastructure limited that process.

Attackers had to infer building layouts from public information, satellite imagery or direct observation.

Digital twins remove much of that uncertainty.

Instead of guessing where critical systems are located, attackers may learn:

• where server rooms are situated
• how power is distributed
• which entrances are electronically controlled
• where security cameras have blind spots
• how emergency routes are organized
• which rooms contain critical infrastructure
• how environmental systems interact

In military planning, such information would once have required extensive reconnaissance.

Today it may exist inside a single engineering platform.

AI Makes Digital Twins Even More Valuable

A digital twin contains far more information than any human can absorb quickly.

Artificial intelligence changes that.

Instead of manually studying thousands of engineering objects, an attacker can use AI to identify patterns, relationships and dependencies almost instantly.

Large language models and graph analysis can assist in:

• identifying critical assets
• mapping operational dependencies
• locating single points of failure
• correlating building systems
• interpreting engineering terminology
• highlighting weak physical security areas
• understanding maintenance workflows

The challenge is no longer finding information.

It is extracting meaning from it.

That is precisely what modern AI excels at.

The Convergence of BIM and Cybersecurity

Building Information Modeling (BIM) has transformed construction and facility management.

Every renovation.

Every maintenance activity.

Every infrastructure upgrade.

Every equipment replacement.

Increasingly, all of it begins with BIM data.

Historically, cybersecurity rarely considered BIM repositories part of the attack surface.

That assumption is becoming increasingly dangerous.

A BIM repository may reveal:

• communication pathways
• cable routes
• network cabinets
• control rooms
• emergency systems
• physical barriers
• redundant infrastructure
• maintenance access points

From an attacker’s perspective, this information reduces uncertainty.

Reduced uncertainty increases operational success.

Physical Security Becomes Transparent

Organizations invest heavily in physical security.

Access badges.

Biometric readers.

Surveillance cameras.

Security zones.

Vehicle barriers.

Emergency exits.

The effectiveness of these controls often depends on limited visibility.

Digital twins can unintentionally remove that advantage.

If attackers understand exactly where security measures exist—and equally important, where they do not—they gain an opportunity to optimize both cyber and physical attack paths.

Knowledge becomes leverage.

Operational Dependencies Become Visible

Buildings are complex systems.

Power supports cooling.

Cooling protects servers.

Servers operate access control.

Access control enables emergency response.

Every subsystem depends on another.

Digital twins increasingly document these relationships.

For operations, this creates resilience.

For attackers, it identifies cascading failure opportunities.

Instead of attacking the strongest component, they can target the weakest dependency.

Supply Chains Gain a New Target

Digital twins rarely remain inside a single organization.

Architects.

Engineering firms.

Construction companies.

Maintenance providers.

Facility managers.

Software vendors.

Cloud providers.

Each may require access throughout the building’s lifecycle.

Every participant introduces another trust relationship.

The security of the digital twin therefore depends not only on the enterprise itself but on an entire ecosystem of external partners.

Compromising one supplier may expose information about hundreds of buildings.

The Governance Gap

Many organizations classify customer databases as confidential.

Financial systems receive extensive protection.

Source code repositories are tightly controlled.

Digital twins often receive far less attention.

They may reside in collaboration platforms with broad access.

Permissions accumulate over years.

Former contractors retain accounts.

Engineering files are copied across multiple systems.

From a governance perspective, these models frequently fall between traditional IT, engineering and facility management responsibilities.

That ambiguity creates risk.

Attackers thrive where ownership is unclear.

A New Classification of Critical Information

Digital twins challenge the traditional definition of sensitive information.

Not every critical asset is a customer record.

Not every high-value dataset contains personal information.

Some of the most strategically valuable information inside an enterprise may instead describe the physical infrastructure that enables every business process.

This information deserves classification, ownership and protection equal to other critical enterprise assets.

Perhaps even greater.

Because once a building’s operational blueprint is exposed, changing it is far more difficult than resetting a password.

What CISOs Should Be Asking

Most organizations already know who owns their ERP system.

Fewer know who owns the digital twin.

Critical governance questions include:

• Where are digital twins stored?
• Who has access?
• Which suppliers can download engineering models?
• Are BIM repositories monitored?
• How are copies controlled?
• Is access logged?
• Are models classified according to business criticality?
• Are digital twins included in enterprise asset inventories?
• Are they considered during cyber risk assessments?

If the answer to several of these questions is “we don’t know,” the governance problem is already apparent.

Looking Ahead

Digital twins were created to help organizations understand their buildings.

Increasingly, they can also help attackers understand them.

The question is not whether digital twins improve operational efficiency.

They unquestionably do.

The real question is whether organizations are protecting these digital representations with the same rigor they apply to the physical facilities they describe.

Because in cybersecurity, the most valuable intelligence is often not stolen from people.

It is stolen from their blueprints.

Coming Next

Part 3 – The Hidden Door: Remote Maintenance as the New Front Line of Building Attacks

Why trusted service providers, permanent VPN connections and remote engineering access are rapidly becoming one of the most attractive entry points into modern smart buildings.

Publication Note & Disclaimer
This article provides security and governance analysis, not legal advice. Regulatory obligations must be assessed against the facts, jurisdictions, data types, and roles of the organizations involved.

This article reflects my personal professional perspective and does not represent the official policy or position of my employer. Drafting and editorial refinement may have been supported by commercially available AI-assisted tools. The analysis, conclusions and final curation are entirely my own.

For information regarding image credits, copyrights, trademarks and other intellectual property rights, please refer to the Imprint.