An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17. The video-core process incorrectly extracts fields from a user-controlled JSON payload leading to a buffer overflow on the stack. The strncpy overflows the destination buffer which has a size of 2 000 bytes. An attacker can send an arbitrarily long \sessionToken\ value in order to exploit this vulnerability.