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CVE-2018-3864

28
FAUCET Score

CVE-2018-3864 is a high-severity buffer overflow vulnerability (CVSS 8.8) affecting the Samsung SmartThings Hub STH-ETH-250, specifically firmware version 0.20.17. An authenticated attacker can exploit this by sending an overly long "password" value to the WifiScan handler, leading to a buffer overflow. This could result in high impact to confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the vulnerability remains a significant risk for unpatched devices.

Impacted Technologies

VendorProductVersion(s)CPE
0.20.17CPE matchmatch criteria
cpe:2.3:o:samsung:sth-eth-250_firmware:0.20.17:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.9CRITICAL

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.80%
Probability of exploitation in next 30 days
EPSS Percentile
76.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0180 is in the 74th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

talosintelligence.com / vulnerability_reports/TALOS-2018-0548
ExploitThird Party Advisory