Questions about how to access someone else's network or test the security of their own router often lead users to apps like WPS Connect. This utility has become widely known for its ability to automatically select PIN codes to activate the WPS function on wireless routers. However, it's important to understand that modern versions of Android have significantly limited the capabilities of such programs, turning them from hacking tools into security diagnostic tools.
The operation of such apps is based on a known vulnerability in the WPS protocol, which was designed to simplify device connections. Instead of entering a long password, users were prompted to enter an 8-digit code, but the algorithm used to generate these codes was often predictable. WPS Connect uses databases of known PIN code generation algorithms for various router manufacturers, trying to guess the correct combination.
Today, using such tools for unauthorized access to other people's networks is illegal and violates computer security laws. In this article, we'll take a detailed look at the technical aspects of the protocol, explain why older routers remain vulnerable, and provide step-by-step instructions on how to close this vulnerability in your equipment's settings.
⚠️ Attention: Using software to gain unauthorized access to other people's Wi-Fi networks is punishable by law. All information in this article is provided for educational purposes only, to assist you in auditing the security of your own equipment.
How the WPS protocol works and its vulnerabilities
Protocol Wi-Fi Protected Setup Wi-Fi Protected Setup (WPS) was introduced by the Wi-Fi Alliance in 2007. Its main goal was to simplify the process of connecting new devices to a wireless network for ordinary users. Instead of entering a complex password containing letters and symbols, users could simply press a button on the router or enter an 8-digit numeric code. However, this very simplicity became the standard's Achilles heel.
The vulnerability lies in the PIN verification method. The code consists of eight digits, but the last digit is a checksum of the first seven. Furthermore, the router doesn't check the code as a whole, but rather separately: first the first four digits, then the next three. This dramatically reduces the number of possible combinations. Instead of 100 million possible combinations (10^8), an attacker only needs to guess about 11,000 (10^4 + 10^3), which takes just minutes, even on a mobile device.
Application WPS Connect and its analogs use pre-prepared algorithms based on the router's MAC address. Many manufacturers (for example, some models TP-Link, D-Link, Huawei) generated PIN codes using predictable formulas. Knowing the MAC address, the program calculates a probable PIN and sends it to the router. If the algorithm matches the factory default, access is granted.
- 🔓 Split check: The router verifies the first 4 digits separately from the rest, which speeds up the brute-force attack.
- 🔢 Predictability: Many devices use the same code generation algorithms across the entire model series.
- 📡 No blocking: Old firmware does not block the IP address after multiple unsuccessful attempts.
Technical limitations of modern Android smartphones
Starting with Android 9 (Pie), Google made fundamental changes to the operating system, affecting access to the Wi-Fi module. Previously, apps could request permission to execute arbitrary commands via the Wi-Fi interface, allowing them to initiate the WPS connection programmatically. In newer versions, this access is blocked.
Wi-Fi now requires a system permission that regular Google Play apps can't access. Without root access (superuser rights), the app WPS Connect It won't be able to send a connection command, even if it correctly enters the PIN. An error message or permission request will appear on the screen, which cannot be granted on the standard firmware.
This means the era of one-click phone hacking is over for most users. Modern smartphones simply don't allow apps to manage the WPS authentication process. Real security testing now requires either root access or specialized hardware, such as adapters that support it. Monitor Mode And Packet Injection, connected to a PC.
Why did Google close this functionality?
The company's primary concern was user security. Open access to the Wi-Fi API allowed any malicious app to track a user's movements, connect to known networks without the user's knowledge, or attack devices on the same network.
| Android version | Accessing the WPS API | Possibility of use | Requirements |
|---|---|---|---|
| Android 8 and below | Open | High | Ordinary rights |
| Android 9 | Limited | Low | Root rights |
| Android 10-14 | Closed | Absent | Root + Modules |
| Android 15+ | Closed | Absent | Special equipment |
| 8.0 Oreo | Partially open | Average | Depends on the vendor |
| 11.0 | Completely closed | No | Emulation only |
Diagnosing vulnerabilities in your own router
Instead of searching for hacking methods, it's wiser to check how secure your own network is. If your router was purchased more than 5-7 years ago and you haven't updated its firmware, the likelihood of a WPS vulnerability is extremely high. Modern models often have this feature disabled by default or employ brute-force protection.
Legal network scanning methods can be used for verification. There are scanner apps that don't attempt to crack the password, but rather simply report whether the WPS protocol is enabled on the access point and whether it's open for connections. This allows you to assess the risk without breaking the law. If the scanner shows that WPS is active, this is the first signal to take action.
It's also worth paying attention to the router model. Some manufacturers, such as Zyxel or old rulers Asus, have been using vulnerable algorithms for a long time. Searching for information about a specific model in vulnerability databases (such as CVE) will help determine whether it is susceptible to Pixie-Dust attacks or standard PIN brute-force attacks.
- 🔍 Visual inspection: Check the sticker on the bottom of your router. If there's a "WPS PIN" field, it means the hardware supports this feature.
- 📱 Mobile scanners: Use apps like Fing or WiFi Analyzer to detect active WPS services.
- 💻 PC Console: Advanced users can use utilities like
reaverorbullyin monitoring mode for testing.
⚠️ Attention: Actively scanning other people's networks and attempting to connect may be considered an attack by the ISP or network owner. Only conduct tests on equipment that belongs to you.
Step-by-step instructions for disabling WPS
The most effective protection method is to completely disable the WPS function in your router settings. Even if you use a complex Wi-Fi password, having an active WPS port leaves a backdoor. The setup process may vary depending on the model, but the general logic is the same for most devices.
First, you need to access the router's web interface. To do this, connect to the network (via cable or Wi-Fi), open a browser, and enter the device's IP address. Most often, this 192.168.0.1 or 192.168.1.1Login information (username and password) are usually located on a sticker on the bottom of the case, unless you have changed them.
After logging in, find the section related to wireless network. It may be called Wireless, Wi-Fi or Wireless modeLook for the tab inside. WPSThere will be a function status switch here. Make sure it is set to the On position. Disabled or DisabledDon't forget to click the "Save" or "Apply" button, otherwise the settings will not be applied.
☑️ Router Security Checklist
In some cases, especially on older models, simply flipping the switch isn't enough. The feature may be hardcoded into the firmware and can't be disabled through software. In this situation, the only security measure is updating the firmware to a version that allows this feature to be deactivated, or replacing the device with a more modern one.
Setting up alternative secure connection methods
After disabling WPS, users may wonder: how can they easily connect new devices now? There's no point in reverting to vulnerable protocols when secure alternatives exist. The modern encryption standard WPA3 (or WPA2-AES) combined with QR codes solves the problem of convenience without compromising security.
Many modern routers and smartphones support QR code connection. In the router interface (section System Tools or Administration) You can often generate a QR code for a guest network or the main access point. Guests simply point their smartphone camera at the code, and the connection will be established automatically, without manually entering a password.
You should also consider creating a guest network. This is an isolated Wi-Fi segment that doesn't have access to your local resources (printers, NAS, PC files). Even if a guest device is infected with a virus, your main network will remain secure. You can set a temporary password or limit the speed for the guest network.
- 📱 QR codes: Generate codes through your router app or online services for quick access for guests.
- 🛡️ Guest area: Isolate visitor devices from the main home infrastructure.
- 🔄 Regular change: Change your guest network password once a month if it is used frequently.
Firmware update and replacement of obsolete hardware
A router's firmware is like an operating system, and it also requires updates. Manufacturers periodically release patches to fix security holes, including WPS vulnerabilities. Checking for a new firmware version should become a regular procedure, for example, once a quarter.
To update, go to the section Administration → Firmware UpgradeSome modern models can update automatically when connected to the internet. If your router is more than 7-8 years old, the manufacturer may have stopped supporting it, and new security patches are no longer available. In this case, the device becomes a potentially dangerous element of the network.
Replacing old equipment is the best investment for a digital home. New routers of the standard Wi-Fi 6 (802.11ax) have improved encryption mechanisms and are often shipped with WPS disabled by default. They provide not only security but also stable speeds for multiple connected devices.
Is it worth installing third-party firmware (OpenWrt, DD-WRT)?
This is an advanced method that can revive an old router by adding support for modern security protocols. However, improper installation ("bricking") can permanently damage the device, voiding the warranty.
Is it possible to hack WPS from a smartphone without root rights?
On modern versions of Android (9.0 and above), this is practically impossible. The system blocks apps from accessing low-level Wi-Fi module commands necessary for MAC address resizing and packet injection. Apps will display an error or require root access.
Does disabling WPS affect internet speed?
No, it doesn't. The WPS protocol is only used when the device connects to the network. After successful authentication, data exchange is performed using standard encryption protocols (WPA2/WPA3). Disabling WPS will not affect download speed or ping.
What should I do if I forgot my Wi-Fi password after disabling WPS?
If WPS is disabled, the only way to find out the password is to look it up in the router settings via the web interface (Wireless Security section) or reset the router to factory settings using the button Reset on the case. After resetting, the password will be the one indicated on the sticker.
Is using WPS Connect illegal?
Using an app to test your own network is legal. However, attempting to connect to someone else's network without the owner's permission falls under the law on unauthorized access to computer information. The law makes no distinction between "simply testing" and "stealing traffic."