TP-Link TL-WR940N router (often referred to as WR940N Plus)

AI Overview

severalvulnerabilities have been identified

in certain versions of the TP-Link TL-WR940N router (often referred to as WR940N Plus),

some of which could potentially lead to data leakage, unauthorized access, or remote code execution

Key Vulnerabilities and Risks

• Active Exploitation: The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added several flaws in specific older TP-Link models, including the WR940N, to its Known Exploited Vulnerabilities (KEV) catalog, indicating they are being actively targeted by hackers.
• Unauthorized Access/Data Exposure: One vulnerability (CVE-2022-43635) allowed attackers to easily obtain a valid session ID, potentially enabling them to extract configuration information, including the Wi-Fi SSID and password.
• Remote Code Execution (RCE): Other flaws, such as a command injection vulnerability, allow attackers to execute commands on the device without proper authorization, potentially granting them full control.
• Denial of Service (DoS): An improper input validation vulnerability in the UPnP module (CVE-2025-11676) can cause the device's service to become unavailable.

Recommendations and Actions

Many of the affected hardware versions have reached their end-of-life support, meaning TP-Link no longer provides security updates for them. The recommended course of action depends on your device's version:

• Check for Firmware Updates: If your specific router model/version is still supported, immediately download and install the latest firmware from the official TP-Link Support site.
• Discontinue Use (Recommended for older models): CISA and security experts strongly recommend immediately ceasing the use of models that are no longer receiving updates due to the high risk of exploitation.
• Upgrade Hardware: Consider upgrading to a newer, secure router that receives regular security patches and includes modern security features like Wi-Fi 6 or Wi-Fi 7.
• General Security Practices:
  • Change Default Credentials: Never use the default "admin" and "admin" username/password combination.
  • Use Strong, Unique Passwords: Use complex, unique passwords for all accounts, including your TP-Link account and router's web interface.
  • Enable Two-Step Verification: If available for your TP-Link account, enable 2FA for an added layer of security.

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