CVE-2018-3878: Samsung Sth-Eth-250 Firmware

Critical severity, CVSS 9.9. EPSS: 1.5% chance of exploitation in the next 30 days.

Multiple exploitable buffer overflow vulnerabilities exist in the credentials handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 devices with 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. A strncpy overflows the destination buffer, which has a size of 16 bytes. An attacker can send an arbitrarily long "region" value in order to exploit this vulnerability.

Affected products

• Samsung Sth-Eth-250 Firmware: version 0.20.17 only

Published 2018-08-23. Last modified 2026-06-17.