CVE-2018-3911

Name: CVE-2018-3911
Creator: NVD / NIST
Published: 2018-08-23T22:29:00.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2018-3911 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. An exploitable HTTP header injection vulnerability exists in the remote servers of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The hubCore process listens on port 39500 and relays any unauthenticated message to SmartThings' remote servers, which insecurely handle JSON messages, leading to partially controlled requests generated toward the internal video-core process. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

An exploitable HTTP header injection vulnerability exists in the remote servers of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The hubCore process listens on port 39500 and relays any unauthenticated message to SmartThings' remote servers, which insecurely handle JSON messages, leading to partially controlled requests generated toward the internal video-core process. An attacker can send an HTTP request to trigger this vulnerability.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

EPSS Probability

1.22%

65.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-113

Affected Software

Vendor	Product	Versions
Samsung	Sth-Eth-250 Firmware	0.20.17

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0578Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0578Exploit, Third Party Advisory

Timeline

Published: Aug 23, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3911?

How severe is CVE-2018-3911?

CVE-2018-3911 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3911?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-3911?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST