What’s Vulnerable › Vulnerabilities

CVE-2018-3866

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% 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

An exploitable buffer overflow vulnerability exists in the samsungWifiScan handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 - 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. The strcpy at [8] overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long 'callbackUrl' value in order to exploit this vulnerability.

Affected products

• Samsung SmartThings Hub STH-ETH-250: 0.20.17

References

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

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