What is CVE-2018-21056?

CVE-2018-21056 is a medium-severity vulnerability in Google Android, classified under Information Disclosure. CVSS score: 4.6/10. Published 2020-04-08.

How severe is CVE-2018-21056?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Information disclosure in Google Android

CVE-2018-21056

An issue was discovered on Samsung mobile devices with O(8.x) software. The Smartwatch displays Secure Folder Notification content. The Samsung ID is SVE-2018-12458 (September 2018).

Vulnerability class: Information Disclosure

Published 2020-04-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions 8.0, 8.1

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2018-21056?: CVE-2018-21056 is a medium-severity vulnerability in Google Android, classified under Information Disclosure. CVSS score: 4.6/10. Published 2020-04-08.
How severe is CVE-2018-21056?: Medium severity. CVSS v3 base score is 4.6 out of 10.