What is CVE-2023-21480?

CVE-2023-21480 is a high-severity vulnerability in Samsung Android, classified under CWE-20 IMPROPER INPUT VALIDATION. CVSS score: 8.5/10. Published 2025-09-03.

How severe is CVE-2023-21480?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in Samsung Android

CVE-2023-21480

Improper input validation vulnerability in CertByte prior to SMR Apr-2023 Release 1 allows local attackers to launch privileged activities.

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

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/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 11.0, 12.0, 13.0
Samsung Mobile Devices — versions SMR Apr-2023 Release in Select Android 11, 12, 13 devices

References

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

Frequently asked questions

What is CVE-2023-21480?: CVE-2023-21480 is a high-severity vulnerability in Samsung Android, classified under CWE-20 IMPROPER INPUT VALIDATION. CVSS score: 8.5/10. Published 2025-09-03.
How severe is CVE-2023-21480?: High severity. CVSS v3 base score is 8.5 out of 10.