What’s Vulnerable › Vulnerabilities

CVE-2018-3863

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-08-23 · updated 2026-06-17
• Weakness: CWE-787

Description

On 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. An attacker can send an HTTP request to trigger this vulnerability. A strcpy overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long "user" value in order to exploit this vulnerability.

Affected products

• Samsung SmartThings Hub STH-ETH-250: 0.20.17

References

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0548
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0548

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