What is CVE-2018-21070?

CVE-2018-21070 is a high-severity vulnerability in Google Android, classified under Improper Validation of Integrity Check Value. CVSS score: 8.4/10. Published 2020-04-08.

How severe is CVE-2018-21070?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Google Android

CVE-2018-21070

An issue was discovered on Samsung mobile devices with N(7.x), O(8.0) devices (MSM8998 or SDM845 chipsets) software. An attacker can bypass Secure Boot and obtain root access because of a missing Bootloader integrity check. The Samsung ID is SVE-2018-11552 (May 2018).

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

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.3% 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 7.0, 7.1.0, 7.1.1
Qualcomm Msm8998
Qualcomm Sdm845

Weakness classification (CWE)

CWE-354 — Improper Validation of Integrity Check Value

References

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

Frequently asked questions

What is CVE-2018-21070?: CVE-2018-21070 is a high-severity vulnerability in Google Android, classified under Improper Validation of Integrity Check Value. CVSS score: 8.4/10. Published 2020-04-08.
How severe is CVE-2018-21070?: High severity. CVSS v3 base score is 8.4 out of 10.