What is CVE-2018-21063?

CVE-2018-21063 is a critical-severity vulnerability in Google Android. CVSS score: 9.8/10. Published 2020-04-08.

How severe is CVE-2018-21063?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Google Android

CVE-2018-21063

An issue was discovered on Samsung mobile devices with M(6.0), N(7.x), and O(8.x) (Exynos chipsets) software. Keymaster has an architectural problem because tlApi in TEE is not properly protected. The Samsung ID is SVE-2018-11792 (August 2018).

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

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Google Android — versions 6.0, 7.0, 7.1.0

References

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

Frequently asked questions

What is CVE-2018-21063?: CVE-2018-21063 is a critical-severity vulnerability in Google Android. CVSS score: 9.8/10. Published 2020-04-08.
How severe is CVE-2018-21063?: Critical severity. CVSS v3 base score is 9.8 out of 10.