TP-Link TL-WR886N is a wireless router from China Pulink.A buffer overflow vulnerability exists in TP-Link TL-WR886N 20190826 2.3.8, which stems from a failure to properly validate data boundaries when executing operations on memory in the /cloud_config/router_post/login function. An authenticated attacker could use this vulnerability to execute arbitrary code on the system via a crafted post request.