Indian government warns of Wi-Fi router security flaw: here’s how to protect your devices

Updated May 29, 2024, 7:50 pm EST

CERT-In warns about a security vulnerability in TP-Link routers that could allow hackers to control devices. Here’s what you can do to protect your devices.

CERT-In warns about a security vulnerability in TP-Link routers that could allow hackers to control devices.

India’s Computer Emergency Response Team (CERT-In) has issued a critical warning regarding a software vulnerability TP-Link routers. This flaw could allow hackers to access and control connected devices without your consent. CERT-In is known for alerting the public to problems with popular software and devices such as Apple, Microsoft, Google and Mozilla. However, the latest warning highlights a threat that can be easily missed but poses significant risk.

The vulnerability in question affects TP-Link routers, specifically Archer models with versions earlier than C5400X(EU)_V1_1.1.7 Build 20240510. TP-Link routers are widely used in homes and offices across India to create wireless networks connecting devices such as smartphones, laptops and tablets with Internet access.

CERT-In explains that the flaw is due to improper neutralization of special elements in a binary file called “rftest”. This file exposes a network service vulnerable to unauthenticated command injection. Simply put, a hacker could exploit this vulnerability to run unauthorized commands on the router, potentially taking control of the network and connected devices.

The Cybersecurity Agency has classified this issue as a high-severity issue. If exploited, it could allow a remote attacker to execute arbitrary code with elevated privileges on the affected system. This means that a hacker can gain high-level access to the router without having to log in, giving him the ability to control the network and the devices connected to it.

Although the situation sounds scary, you can take steps to protect yourself:

1. Fix it: Update your router’s firmware

Think of a patch as a digital bandage for your router’s security wound. Most manufacturers, including TP-Link, release firmware updates to address security vulnerabilities. Here’s how to update your router’s firmware:

– Check your router’s admin interface, which can usually be accessed via a web browser. This interface should include a section dedicated to firmware updates.

– Alternatively, visit the TP-Link website and search for a firmware update for your specific router model.

2. Security Basics: Strengthen your network security

Here are some additional security measures you can take to strengthen your Wi-Fi network:

Change default login details: Router manufacturers often configure default usernames and passwords. It is very important to change them to a unique and complex combination.
Enable strong encryption: Encryption scrambles data as it flows through the network, making it unreadable to anyone trying to eavesdrop. Select WPA3 encryption if available, or WPA2 as the next best option. Avoid WEP because it is outdated and easy to crack.
Disable remote management: This feature allows you to access your router settings from the Internet. Unless specifically needed, it is best to disable this feature to minimize potential entry points for attackers.
Set a strong Wi-Fi password: Your Wi-Fi password acts as the guardian of your network. Choose a strong password consisting of uppercase and lowercase letters, numbers and symbols.
Disable WPS (Wi-Fi Protected Setup): WPS may be vulnerable to attacks hacking trying. If possible, disable this option in your router settings.
Monitor connected devices: Keep an eye on the devices connected to your network. Some routers allow you to view this information through the admin interface. If you see any unrecognized devices, investigate them immediately.
Secure DNS service: A secure DNS service acts like an online directory, directing your devices to the websites you visit. Consider using a secure DNS provider such as OpenDNS or Google DNS for additional protection.
Regular restart: Just as restarting your computer can sometimes fix glitches, periodically restarting your router can help resolve temporary problems and refresh your network’s security.
Firewall and security features: Most routers have built-in firewalls that act as a barrier against unauthorized access. Make sure your router’s firewall is turned on and check out the additional security features your model offers.

Stay alert, stay safe

By following the steps below and, if necessary, updating your TP-Link router, you can significantly increase the security of your network and keep hackers at bay. Remember that cybersecurity is an ongoing process. Stay on top of potential threats and update your software regularly to ensure solid protection.