What is CVE-2021-25340?

CVE-2021-25340 is a medium-severity vulnerability in Google Android, classified under Improper Access Control. CVSS score: 5.1/10. Published 2021-03-04.

How severe is CVE-2021-25340?

Medium severity. CVSS v3 base score is 5.1 out of 10.

Vulnerability in Google Android

CVE-2021-25340

Improper access control vulnerability in Samsung keyboard version prior to SMR Feb-2021 Release 1 allows physically proximate attackers to change in arbitrary settings during Initialization State.

Published 2021-03-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.8% 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 10.0
Samsung Mobile Devices — versions SMR Feb-2021 Release 1

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2021-25340?: CVE-2021-25340 is a medium-severity vulnerability in Google Android, classified under Improper Access Control. CVSS score: 5.1/10. Published 2021-03-04.
How severe is CVE-2021-25340?: Medium severity. CVSS v3 base score is 5.1 out of 10.