What is threat modeling in cybersecurity?

Threat modeling is a process of reviewing a system's design to find security weaknesses before the system is built or changed. Teams identify attack paths, rate their risk, and decide which controls to add.

When should threat modeling happen in the development lifecycle?

Threat modeling works best at design time, before code is written. It can also run continuously in a CI/CD pipeline to catch new risks when architecture changes.

What is the STRIDE threat modeling framework?

STRIDE is a framework that categorizes threats into six types: Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, and Elevation of Privilege. Teams use it to systematically check each component of a system against each threat type.

How is threat modeling different from a penetration test?

A penetration test attacks a running system to find exploitable weaknesses. Threat modeling reviews a design or architecture to find risks before the system is deployed, so problems can be fixed at lower cost.

What is Threat Modeling?

Threat Modeling is a structured process for identifying security risks, attack vectors, and design flaws in a system or application before code is written or deployed. Teams use it to prioritize security controls based on realistic threats rather than fixing vulnerabilities after the fact.

What it does

Threat modeling examines a system's architecture to find where an attacker could cause harm. Practitioners map data flows, trust boundaries, and entry points, then enumerate threats against each component. Common frameworks include STRIDE, PASTA, and LINDDUN. Tools in this category automate parts of that process: they ingest diagrams, infrastructure-as-code files, or plain-text descriptions and produce a list of threats, suggested mitigations, and sometimes compliance mappings. Some tools run at design time; others integrate into CI/CD pipelines to flag new threats as architecture changes.

Why teams buy it

Fixing a design flaw before a line of code is written costs far less than patching a deployed system. Threat modeling sits earlier in the development lifecycle than Static Application Security Testing (SAST), Dynamic Application Security Testing (DAST), or Runtime Application Self-Protection (RASP). It catches architectural problems those tools cannot see, such as missing authentication between internal services or over-privileged data flows. Regulated industries, including healthcare and connected-device manufacturing, often require documented threat models to satisfy frameworks like HIPAA, FDA guidance, or IEC 62443.

What to look for

Integration points: Can the tool ingest your existing architecture diagrams, IaC templates, or API specs without manual redrawing?
Framework coverage: Does it support the threat frameworks your team or auditors require, such as STRIDE or PASTA?
Automation depth: Does it generate threats automatically, or does it only provide a blank canvas with guided prompts?
CI/CD fit: Can it run in a pipeline and block or warn on new architectural changes that introduce risk?
Output format: Does it export findings in a format your ticketing or GRC system can consume?

What is Threat Modeling?

What it does

Why teams buy it

What to look for

Common confusions

Threat Modeling tools

Frequently asked questions