What is CVE-2018-3876?

CVE-2018-3876 is a high-severity vulnerability in Samsung Smartthings Hub Sth-Eth-250, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2018-09-21.

How severe is CVE-2018-3876?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Samsung Smartthings Hub Sth-Eth-250

CVE-2018-3876

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 strncpy overflows the destination buffer, which has a size of 64 bytes. An attacker can send an arbitrarily long "bucket" value in order to exploit this vulnerability.

Vulnerability class: Buffer Overflow

Published 2018-09-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Samsung Smartthings Hub Sth-Eth-250 — versions Firmware version 0.20.17
Samsung Sth-Eth-250
Samsung Sth-Eth-250 Firmware — versions 0.20.17

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

talosintelligence.com/vulnerability_reports/TALOS-2018-0555 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-3876?: CVE-2018-3876 is a high-severity vulnerability in Samsung Smartthings Hub Sth-Eth-250, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2018-09-21.
How severe is CVE-2018-3876?: High severity. CVSS v3 base score is 8.8 out of 10.