What is CVE-2021-25378?

CVE-2021-25378 is a medium-severity vulnerability in Samsung Smartthings, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2021-04-09.

How severe is CVE-2021-25378?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Samsung Smartthings

CVE-2021-25378

Improper access control of certain port in SmartThings prior to version 1.7.63.6 allows remote temporary denial of service.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-04-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (60.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Samsung Smartthings
Samsung Mobile Smartthings — versions unspecified

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security.samsungmobile.com/ (Vendor Advisory)
security.samsungmobile.com/serviceWeb.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25378?: CVE-2021-25378 is a medium-severity vulnerability in Samsung Smartthings, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2021-04-09.
How severe is CVE-2021-25378?: Medium severity. CVSS v3 base score is 4.3 out of 10.