How severe is CVE-2018-3876?

CVE-2018-3876 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-3876 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3876?

CVE-2018-3876 affects Samsung Sth-eth-250 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3876?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-3876 published?

CVE-2018-3876 was published on 2018-09-21 and last updated on 2026-06-17.

CVE-2018-3876

CVE-2018-3876 is a high-severity vulnerability in Samsung Sth-eth-250 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Samsung Sth-eth-250 Firmware
Published: 2018-09-21
Last modified: 2026-06-17

Description

An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17. The strncpy overflows the destination buffer, which has a size of 64 bytes. An attacker can send an arbitrarily long "bucket" value in order to exploit this vulnerability.

Frequently asked questions

What is CVE-2018-3876?: An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250-Firmware version 0.20.17. The strncpy overflows the destination buffer, which has a size of 64 bytes. An attacker can send an arbitrarily long "bucket" value in order to exploit this vulnerability.
How severe is CVE-2018-3876?: CVE-2018-3876 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-3876 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3876?: CVE-2018-3876 affects Samsung Sth-eth-250 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3876?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-3876 published?: CVE-2018-3876 was published on 2018-09-21 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0555

Affected products (1)

cpe:2.3:o:samsung:sth-eth-250_firmware:0.20.17:*:*:*:*:*:*:*

More vulnerabilities in Samsung Sth-eth-250 Firmware

CVE-2018-3907 — Critical (CVSS 10.0): An exploitable vulnerability exists in the REST parser of video-core's HTTP server of the Samsung SmartThings Hub…
CVE-2018-3877 — Critical (CVSS 9.9): An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung…
CVE-2018-3874 — Critical (CVSS 9.9): An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung…
CVE-2018-3873 — Critical (CVSS 9.9): An exploitable buffer overflow vulnerability exists in the credentials handler of video-core's HTTP server of Samsung…
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