Security readout for executives and security teams
Plain-English summary
This CVE affects Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17. A flaw in the hub's HTTP handling can let an authenticated network attacker crash the service or potentially take control of affected functionality. It is rated critical because successful exploitation could affect confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any confirmed affected hub, especially in business or shared-network environments. The practical priority is inventory, isolation, and vendor-supported update or retirement, because the provided sources do not name a specific patch.
Technical view
The Samsung WifiScan handler in video-core's HTTP server uses strcpy into a 40-byte destination buffer. An authenticated network attacker can supply an oversized password value, causing a buffer overflow. CVSS 3.0 is 9.9 with low complexity, no user interaction, changed scope, and high CIA impact.
Likely exposure
Exposure is likely limited to organizations or homes still running Samsung SmartThings Hub STH-ETH-250 firmware 0.20.17. Risk rises if the hub's HTTP service is reachable from untrusted networks or if low-privilege credentials are broadly available.
Exploitation context
The source bundle describes the vulnerability as exploitable, but does not cite known in-the-wild exploitation. It is not listed as CISA KEV in the provided data. Exploitation requires network access and low privileges, with no user interaction.
Researcher notes
Key evidence is the Talos report and CVE record. The affected product and version are narrowly stated. The bundle does not provide CWE mapping, exploit-in-the-wild evidence, or a named fixed firmware version, so remediation should be tied to Samsung guidance.
Mitigation direction
- Identify any Samsung SmartThings Hub STH-ETH-250 devices and firmware versions.
- Check Samsung SmartThings vendor guidance for supported firmware updates or retirement advice.
- Restrict hub HTTP access to trusted management networks only.
- Remove port forwards or external exposure to SmartThings hub management services.
- Limit hub credentials to trusted administrators and rotate weak shared credentials.
Validation and detection
- Confirm whether any hubs report firmware version 0.20.17.
- Verify the hub management interface is not reachable from untrusted networks.
- Review firewall, router, and remote-access rules for exposed hub services.
- Check asset inventory for retired or unmanaged STH-ETH-250 devices.
- Document vendor firmware status and remediation decision for each device.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-3864 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H3.16Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.9CriticalVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0548CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.