Tp-link TL-WR840N is a wireless router from Tp-link (China). tp-link TL-WR840N EU v5 router TL-WR840N(EU) v5 171211 firmware previous version has a security vulnerability where the PING function in the device lacks filtering and escaping for data submitted by IP address and is vulnerable to to remote code execution attacks via a carefully crafted load in the IP address input field. No details of the vulnerability are currently available.