WiFi security audit: what vulnerabilities a pentester looks for

By the QuantumSec team

A misconfigured corporate WiFi network is a direct route into the internal network that needs neither a cable nor physical access to a building: being within signal range is enough. Yet it's one of the surfaces fewest companies formally audit. This guide explains what a WiFi security audit actually tests and why it differs from a conventional network audit.

Why corporate WiFi is a different kind of attack vector

Unlike an attack over the internet, a WiFi attack doesn't need to exploit any exposed service: being physically close (in the parking lot, the building next door, or a waiting room) is enough to start interacting with the network. That changes the threat model: firewalls and patches aren't enough — you need to assess the encryption protocol, authentication and the physical segmentation of the signal, none of which a conventional vulnerability scan covers.

The most common attack vectors on corporate WiFi networks

Capturing and cracking WPA2 handshakes through dictionary attacks or PMKID techniques, which don't even require a client to be connected at the time of the attack. Evil Twin and KARMA attacks: a fake access point mimicking the legitimate one to capture credentials. Rogue access points installed without authorization by employees (often with good intentions, for better coverage) that completely bypass network segmentation. Deauthentication attacks to force reconnections and capture handshakes. And poorly segmented guest networks that, in practice, have visibility into internal systems.

WPA2 vs WPA3: what actually changes for a business

WPA3 introduces SAE (Simultaneous Authentication of Equals), which removes the ability to capture a handshake and crack it offline the way you can with WPA2-PSK, and adds forward secrecy: even if the password is compromised, previously captured traffic stays protected. The practical problem is that much of the installed corporate hardware (access points, controllers, IoT devices) still doesn't support WPA3, and in WPA2/WPA3-Enterprise environments using 802.1X, the relevant attack vector shifts away from PSK cracking toward the RADIUS server and 802.1X configuration itself — which is where a professional audit actually focuses.

What a professional WiFi security audit includes

OWISAM methodology (Open Wireless Security Assessment Methodology): inventory of every access point in the perimeter (authorized and unauthorized), assessment of the encryption and authentication protocols in use, controlled capture and cracking tests, Evil Twin and rogue AP detection, and verification of real segmentation between corporate, guest and IoT networks. The result is a technical report with findings by severity, evidence and vendor-specific configuration recommendations (Cisco, Aruba, Ubiquiti, etc.), not a generic best-practices checklist.

FAQ

Do you need to be physically on-site to run this audit?

Yes, for the full assessment. Unlike a web or network pentest that can run remotely, wireless network analysis requires physical presence within signal range. We schedule the visit at a time that minimizes disruption to your operations.

Can a WiFi audit affect connectivity during business hours?

The more aggressive tests (like deauthentication attacks) are agreed in advance and, if there is a risk of disruption, run outside business hours or during a maintenance window. Most of the assessment (inventory, configuration review) does not affect the service.

How long does a WiFi security audit take?

Between 1 and 3 days depending on the number of sites, access points and segmentation complexity. The report is usually delivered 2-3 days after fieldwork ends.