The question of how to access someone else's Wi-Fi network often arises for users who have forgotten the password to their own access point or are concerned about the security of their equipment. Wi-Fi hacking — is the process of violating the privacy of a wireless network, which can be accomplished using either specialized software or social engineering. It's important to understand that unauthorized access to other people's networks is illegal in most countries.
Modern encryption standards, such as WPA3, make it much more difficult for attackers, but many users still exploit outdated protocols or use weak passwords. In this article, we'll take a detailed look at the theoretical underpinnings of wireless network attacks and protocol vulnerabilities. WPS and the methods that cybersecurity professionals use to audit networks. The only legal way to test your network's strength is to run a penetration test on your own equipment with the owner's consent.
Security analysis begins with the understanding that a wireless signal travels over the open air and can be intercepted by any device within range. Packet sniffing It allows for traffic analysis, but without the encryption key, the data will remain unreadable. This is why understanding encryption mechanisms is critical for protecting your personal perimeter.
WPS Protocol Vulnerabilities and Attack Methods
One of the most common vulnerabilities in home routers is the function WPS (Wi-Fi Protected Setup), designed to simplify device connection. The problem is that it uses an 8-digit PIN for authorization, which can theoretically be brute-forced. WPS attack This is possible because the code verification takes place in two stages, which reduces the number of required attempts from millions to a few thousand.
To carry out such an attack, attackers use specialized tools such as Reaver or Bully, running on Linux-based operating systems, such as Kali LinuxThe process involves sending requests to the router and analyzing the system's responses to determine whether the first or second half of the PIN code is correct. If the router isn't protected against such attacks (for example, by blocking it after several unsuccessful attempts), the password can be cracked in a matter of hours.
⚠️ Warning: The WPS protocol contains fundamental design flaws. Even if you set a strong Wi-Fi password, enabling WPS leaves a backdoor into your network.
To secure your network, you should completely disable the WPS function in your router settings. If this option isn't available (for some providers), we recommend upgrading to a more modern router. It's also worth noting that new security standards are gradually phasing out support for this technology.
WPA2 Attacks: Handshake Interception
The most common standard of protection today remains WPA2-PSK (Pre-Shared Key). Hacking such a network using brute-force attacks is impossible due to the huge number of combinations, so hackers use an attack that intercepts the "handshake." When a legitimate device connects to the network, it exchanges encrypted data with the router, containing a password hash.
An attacker in monitoring mode waits for the client to connect or forcibly disconnects it from the network (death attack) to force a reconnection. The resulting handshake file is saved and subjected to an offline dictionary attack. The brute-force speed depends on the GPU's performance and the password's complexity.
- 🔓 Deauth attack: Sending disconnect packets to the client on behalf of the router.
- 📡 Monitoring mode: Wi-Fi adapter status for listening to the entire broadcast.
- 💻 GPU acceleration: Using a video card to quickly brute force hashes.
The effectiveness of this method directly depends on the complexity of the password set by the user. Simple combinations like "12345678" or dictionary words can be brute-forced in seconds. Using long passwords with mixed-case and special characters makes this attack practically pointless in terms of time and resources.
Dictionary attacks and social engineering
Often, gaining access to Wi-Fi doesn't require complex technical tricks; social engineering or default passwords are sufficient. Many users don't change factory settings, and the password remains as indicated on the sticker inside the device. Attackers use databases of default passwords for various router models (TP-Link, D-Link, ASUS).
Another popular method is dictionary attack (dictionary attack). The software doesn't try every possible combination, but rather millions of frequently used passwords taken from leaked databases. If you use your name, date of birth, or a simple word in any language, the chances of being hacked are close to 100%.
| Password type | Time of selection (estimate) | Complexity |
|---|---|---|
| 4-6 digits | Instantly | Critically low |
| Vocabulary word | Less than 1 second | Low |
| 8 characters (lowercase) | A few hours | Average |
| 12+ characters (mix) | Millions of years | High |
Social engineering also includes creating fake access points with names similar to legitimate ones (Evil Twin). A user might accidentally connect to the "Home_Wi-Fi_Free" network instead of their "Home_Wi-Fi" network, after which they'll be redirected to a phishing site mimicking the ISP's login page, where they'll voluntarily enter their credentials.
What are Rainbow Tables?
These are pre-computed hash tables that allow you to instantly find the original password text from its hash, bypassing the brute-force process. They are effective against older hashing algorithms, but less useful against modern salted methods.
Security audit software
To test network security, administrators use specialized software. The leading distribution in this area is Kali Linux, containing a pre-installed set of utilities. The main tool for working with wireless interfaces is the package Aircrack-ng, which includes tools for sniffing, packet injection, and password testing.
The analysis process usually begins with putting the network card into monitor mode using the command airmon-ng start wlan0. After this, the utility airodump-ng Scans the airwaves, displaying available networks, channels, and connected clients. Network penetration requires an adapter that supports packet injection, which is a significant technical limitation.
⚠️ Warning: Using tools like Aircrack-ng, Wireshark, or Fern Wi-Fi Cracker on someone else's network without the owner's written permission is illegal.
Besides console interfaces, there are graphical interfaces such as Wi-Fi Analyzer or NetCut, which allow network visualization and, in some cases, management of connected clients (within a local network). However, for actual encryption cracking, graphical programs on Android or Windows are often less effective than specialized Linux scripts.
☑️ Network security check
How to protect your router from hacking
Understanding attack methods allows you to formulate effective defense measures. The first and most important step is to change the factory administrator password and Wi-Fi network password. Passwords should be unique, long, and free of predictable sequences. It is recommended to use multi-word phrases separated by special characters.
It's essential to update your router's firmware to the latest version. Manufacturers regularly release patches to fix software vulnerabilities. Older router models that no longer receive security updates are best replaced, as they become easy targets for automated bots scanning the internet for vulnerabilities.
- 🔒 Encryption: Use only WPA2-AES or WPA3.
- 🚫 WPS: The function must be disabled.
- 👁️ Remote control: Disable access to router settings from the external network (WAN).
It is also recommended to disable the protocol UPnP (Universal Plug and Play) if not used, as it can allow devices within the network to open ports on the router without the user's knowledge. For guests, a separate guest network should be set up with limited access to local resources.
Legal aspects and ethics
It's important to understand the legal consequences of your actions in the digital space. In the Russian Federation, as in many other countries, unauthorized access to computer information (Article 272 of the Russian Criminal Code) and the creation of means for unauthorized access (Article 273 of the Russian Criminal Code) are criminal offenses. Even if the intent was not to steal data, but simply to "test the connection," the very act of connecting to someone else's network can be considered a violation.
Information security specialists (ethical hackers) conduct penetration testing exclusively under a contract with the infrastructure owner. All actions within this scope are strictly documented and limited to the agreed-upon scope. Any deviation from the agreed-upon testing boundaries may result in legal liability.
⚠️ Please note: IT legislation is subject to change. Before conducting any experiments with network equipment, please check the current laws in your country.
If you discover a neighbor's open network, the best thing to do is not connect to it but report it, as the lack of a password makes not only the network owner but also everyone connected to it vulnerable. Your own internet security begins with configuring your own router.
Is it possible to track who is connected to Wi-Fi?
The router owner can see the MAC addresses of connected devices in the logs. If the device was connected to the internet, the provider can identify the SIM card or contract owner, but this requires a request from law enforcement.
Is it possible to hack Wi-Fi from a phone?
Technically, it's possible if the phone has rooted Android and a dedicated Wi-Fi module that supports monitor mode. However, the effectiveness of such attacks is significantly lower than using a full-fledged computer and an external antenna. Most apps on the Play Market are either fake or contain viruses.
What to do if you forgot your password but need access?
If you are the owner of the router, the easiest way is to reset the device to factory settings using the button Reset on the case (hold for 10-15 seconds). After that, you can enter the settings using the default password (indicated on the sticker) and set a new one. You will have to re-enter all internet settings.
Does hiding your SSID help prevent hacking?
Hiding the network name (SSID) only creates the illusion of security. The network still broadcasts control packets, which are easily detected by any sniffer. This is an inconvenience for legitimate users, but no obstacle for an attacker. It's better to use strong encryption than to rely on secrecy.
What is the most secure Wi-Fi standard in 2026?
The most modern and safe standard is WPA3It protects against brute-force attacks even with simple passwords thanks to the SAE (Simultaneous Authentication of Equals) mechanism. If your hardware supports WPA3, we recommend upgrading to it.