What is CVE-2025-21031?

CVE-2025-21031 is a medium-severity vulnerability in Samsung Android, classified under Improper Access Control. CVSS score: 6.8/10. Published 2025-09-03.

How severe is CVE-2025-21031?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Samsung Android

CVE-2025-21031

Improper access control in ImsService prior to SMR Sep-2025 Release 1 allows local attackers to use the privileged APIs.

Published 2025-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L.

EPSS exploit prediction

EPSS: 0.001 (2.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.4% 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

Samsung Android — versions 13.0, 14.0, 15.0
Samsung Mobile Devices — versions SMR Sep-2025 Release in Android 13, 14, 15, 16

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2025-21031?: CVE-2025-21031 is a medium-severity vulnerability in Samsung Android, classified under Improper Access Control. CVSS score: 6.8/10. Published 2025-09-03.
How severe is CVE-2025-21031?: Medium severity. CVSS v3 base score is 6.8 out of 10.