Glossary
Shadow IT is any system, app or cloud service used within an organisation without the knowledge or approval of central IT — and it’s a major source of hidden attack surface.
Definition
Shadow IT refers to hardware, software, cloud services and internet-facing assets deployed and used without the awareness or sanction of central IT or security teams. It ranges from a team spinning up a cloud instance or SaaS trial to forgotten marketing microsites and infrastructure inherited through acquisitions. Because these assets sit outside official inventories, they are rarely patched or monitored — making them a favourite entry point for attackers.
Why it matters
Research consistently shows organisations are aware of only a fraction of their true external footprint. The remainder — shadow IT, forgotten infrastructure and acquired assets — is precisely where breaches begin, because it’s unmanaged and unmonitored.
Examples
Instances, buckets and services spun up outside IT.
Microsites and environments created by other teams.
Old portals and web apps left online and unpatched.
Assets inherited through mergers and acquisitions.
Databases and admin panels left publicly reachable.
Anything internet-facing that never made it to inventory.
How it works
Continuously map your full external footprint, including unknown assets.
Link discovered assets back to your organisation.
Check each for vulnerabilities, misconfigurations and exposure.
Keep watching, because new shadow assets appear constantly.
Related
FAQ
Shadow IT is any system, app or cloud service used without the knowledge or approval of central IT — a major source of unknown attack surface.
Because it sits outside official inventories, shadow IT is rarely patched or monitored, making it an easy entry point for attackers.
Attack Surface Management discovers internet-facing assets from the outside in, surfacing unknown and forgotten ones.
Effectively yes — assets inherited through M&A are often unmanaged and unmonitored until discovered.
Discover the shadow IT and forgotten assets attackers find first.
