What is CVE-2021-25389?

CVE-2021-25389 is a low-severity vulnerability in Google Android, classified under Improper Authentication. CVSS score: 2.3/10. Published 2021-06-11.

How severe is CVE-2021-25389?

Low severity. CVSS v3 base score is 2.3 out of 10.

Auth bypass in Google Android

CVE-2021-25389

Improper running task check in S Secure prior to SMR MAY-2021 Release 1 allows attackers to use locked app without authentication.

Vulnerability class: Broken Authentication

Published 2021-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.3 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.3% 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 9.0
Samsung Mobile Devices — versions P(9.0)

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2021-25389?: CVE-2021-25389 is a low-severity vulnerability in Google Android, classified under Improper Authentication. CVSS score: 2.3/10. Published 2021-06-11.
How severe is CVE-2021-25389?: Low severity. CVSS v3 base score is 2.3 out of 10.