What Software Is Installed on My Network? How to Get a Complete Picture

It sounds like a simple question: what software is installed across our network? But in practice, most IT teams cannot answer it - at least not accurately.

Endpoints accumulate software over time. Employees install browser extensions, free utilities, and personal applications. Developers spin up tools they need for a single project and never remove them. Older machines run legacy software that nobody remembers deploying. And across all of this, the spreadsheet that was supposed to track everything quietly falls out of date.

The gap between what you think is installed and what is actually installed is where compliance failures, security vulnerabilities, and wasted license spend emerge.

What's the Risk of Not Knowing What's on Your Network?

The pressure to know exactly what software is running on your network has intensified in the past few years, driven by three converging forces.

1. Compliance frameworks now explicitly require accurate network inventory

One of the key requirements of aligning to the CIS Controls, NIST Cybersecurity Framework, ISO 27001, or Australia's Essential 8 is maintaining a current, accurate inventory of authorised and unauthorised software. Auditors don't accept "we think" as evidence - they want timestamped, verifiable records.

2. The attack surface is directly proportional to the amount of software on your network

Every installed application is a potential entry point. Unpatched software, end-of-life applications that no longer receive security updates, and unauthorised tools that bypass corporate security policies all present risks. You cannot patch what you do not know about, and you cannot remove what you cannot see.

3. Software licensing costs continue to climb

Organisations routinely pay for licenses they do not need because they lack visibility into actual usage. Conversely, they risk significant penalties when auditors from vendors like Microsoft, Adobe, or Oracle discover installations that exceed their licensed entitlements. Accurate software inventory is the foundation of effective license management in both directions.

Where Manual Tracking Breaks Down

Most organisations start with some form of manual software tracking - a spreadsheet, a wiki page, or entries in a service management database.

The process typically looks like this:

• When a new machine is provisioned, someone records the standard software build.
• When a software request is approved, someone updates the record.
• When a machine is decommissioned, someone removes the entry.

The problem here is the word "someone." Each of these steps requires a human to remember, have the time, and perform these tasks accurately. And even when that occurs, the documentation drifts from reality within days.

Manual tracking can also miss entire categories of software:

• Applications installed without going through a request process (browser-based tools, portable applications, command-line utilities) never enter the inventory.
• Software that comes bundled with other installations often goes unrecorded.
• On shared machines or those used by multiple shifts, installations can happen without any single person taking ownership.

These processes are standard for many IT teams, but the resulting inventory is both incomplete and unreliable. It tells you what was supposed to be installed, not what actually is.

How Automated Discovery Fixes the Problem

Automated software inventory works by scanning devices on the network and reading the installed software directly from the operating system. On Windows, this means querying the registry and WMI. On Linux and macOS, it means reading package manager databases and application directories.

On each pass, the automated discovery tool records every installed application, its version, and when it was installed or last updated.

When scans run on a schedule - daily or weekly - IT teams can access a living inventory that stays aligned with what is actually deployed, catching everything that manual processes miss. New installations are detected automatically, removals are tracked, version changes are recorded with timestamps, and no human data entry is required.

Examples of assets IT teams can find with automated discovery that they would have missed with manual discovery include:

• a testing tool a developer installed six months ago
• an outdated PDF reader that is three major versions behind
• a remote access application that an employee installed to work from home
• an unlicensed copy of a commercial application that creates legal exposure.

Beyond asking what software is installed on your known devices, automated discovery also makes it possible to answer the question in reverse: where is a specific piece of software installed?

When you're alerted to a critical vulnerability in a particular application, you need to identify every instance across your network immediately. A manual inventory gives you a starting point and a lot of uncertainty, but a discovery-based inventory gives you that answer in seconds.

How to Turn Software Inventory Data Into Action

Knowing what software is installed is the foundation of strong risk management - what you do with that information determines the value.

Start with a baseline. Run a full discovery scan and review what comes back. You will almost certainly find applications you did not expect - that's normal and exactly the point.

Categorize findings into authorised software that should be there, unauthorised software that needs investigation, and outdated software that needs patching or removal.

From there, establish a regular cadence. Weekly scans are sufficient for most environments, but scan daily for high-security segments. Use change detection to flag new installations and trigger review workflows. Build reports that show software compliance trends over time so you can demonstrate progress to auditors and leadership.

Over time, accurate software inventory feeds into broader IT operations and:

• improves vulnerability management because you know exactly what needs patching
• supports license optimisation because you can see what is installed versus what is being used
• it strengthens incident response because you can quickly identify machines running affected software when a new threat emerges.

How Open-AudIT Automates Your Software Inventory

Open-AudIT performs agentless software discovery across Windows, Linux, and macOS endpoints without requiring any software installation on the devices being scanned. Each scan captures a complete list of installed applications, their versions, install dates, and publishers.

The platform compares each scan against previous results to detect changes - new installations, removals, and version updates are all recorded with full audit trails. Pre-built reports cover common use cases like software license compliance, end-of-life software detection, and unauthorised application identification. Custom queries let teams answer specific questions about their environment on demand.

For organisations managing compliance obligations, Open-AudIT maps software inventory data against frameworks including Essential 8, CIS, NIST, and ISO 27001, providing dashboard views that show compliance posture at a glance.

Get Started

Open-AudIT's free Community edition supports discovery of up to 100 devices. Run a scan, see what software is actually on your network, and find out what you have been missing.

Download Open-AudIT Free