What is CVE-2021-25344?

CVE-2021-25344 is a medium-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 6.2/10. Published 2021-03-04.

How severe is CVE-2021-25344?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Auth bypass in Google Android

CVE-2021-25344

Missing permission check in knox_custom service prior to SMR Mar-2021 Release 1 allows attackers to gain access to device's serial number without permission.

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-10-01.

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, 11.0
Samsung Mobile Devices — versions Q(10.0), R(11.0)

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

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

Frequently asked questions

What is CVE-2021-25344?: CVE-2021-25344 is a medium-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 6.2/10. Published 2021-03-04.
How severe is CVE-2021-25344?: Medium severity. CVSS v3 base score is 6.2 out of 10.