What’s Vulnerable › Vulnerabilities

CVE-2018-3903

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% 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. The memcpy call overflows the destination buffer, which has a size of 512 bytes. An attacker can send an arbitrarily long "url" value in order to overwrite the saved-PC with 0x42424242.

Affected products

• Samsung SmartThings Hub STH-ETH-250: 0.20.17

References

• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0574
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0574

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