CVE-2021-41653 : Security Advisory and Response

The TP-Link TL-WR840N EU v5 router is vulnerable to remote code execution via a crafted payload in an IP address input field.

Understanding CVE-2021-41653

The TP-Link TL-WR840N EU v5 router firmware allows remote code execution through a specific payload injection.

What is CVE-2021-41653?

The vulnerability in the TP-Link TL-WR840N EU v5 router firmware allows attackers to execute arbitrary code remotely.

The Impact of CVE-2021-41653

Remote attackers can exploit this vulnerability to control the affected router remotely.
Unauthorized access to the device may lead to further network compromise.

Technical Details of CVE-2021-41653

The vulnerability details of the TP-Link TL-WR840N EU v5 router firmware issue.

Vulnerability Description

The PING function on the TP-Link TL-WR840N EU v5 router with firmware through TL-WR840N(EU)_V5_171211 is susceptible to remote code execution.

Affected Systems and Versions

Product: TP-Link TL-WR840N EU v5 router
Firmware: TL-WR840N(EU)_V5_171211

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting a crafted payload into an IP address input field.

Mitigation and Prevention

Preventive measures and actions to address CVE-2021-41653.

Immediate Steps to Take

Update the router firmware to the latest version provided by TP-Link.
Implement strong network access controls to restrict unauthorized access.

Long-Term Security Practices

Regularly monitor for firmware updates and security advisories from TP-Link.
Configure the router with strong, unique passwords and consider network segmentation.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and protect the network and devices.