What is CVE-2023-21437?

CVE-2023-21437 is a medium-severity vulnerability in Samsung Android, classified under Improper Authentication. CVSS score: 4.0/10. Published 2023-02-09.

How severe is CVE-2023-21437?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Auth bypass in Samsung Android

CVE-2023-21437

Improper access control vulnerability in Phone application prior to SMR Feb-2023 Release 1 allows local attackers to access sensitive information via implicit broadcast.

Vulnerability class: Broken Authentication

Published 2023-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (3.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Samsung Android — versions 10.0, 11.0, 12.0
Samsung Mobile Devices — versions Q(10), R(11), S(12), T(13)

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2023-21437?: CVE-2023-21437 is a medium-severity vulnerability in Samsung Android, classified under Improper Authentication. CVSS score: 4.0/10. Published 2023-02-09.
How severe is CVE-2023-21437?: Medium severity. CVSS v3 base score is 4.0 out of 10.