What is CVE-2023-21467?

CVE-2023-21467 is a medium-severity vulnerability in Samsung Exynos, classified under Improper Authentication. CVSS score: 4.6/10. Published 2025-09-03.

How severe is CVE-2023-21467?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Auth bypass in Samsung Exynos

CVE-2023-21467

Error in 3GPP specification implementation in Exynos baseband prior to SMR Apr-2023 Release 1 allows incorrect handling of unencrypted message.

Vulnerability class: Broken Authentication

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

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (21.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Samsung Exynos
Samsung Mobile Devices — versions SMR Apr-2023 Release in Select devices using Exynos chipsets

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2023-21467?: CVE-2023-21467 is a medium-severity vulnerability in Samsung Exynos, classified under Improper Authentication. CVSS score: 4.6/10. Published 2025-09-03.
How severe is CVE-2023-21467?: Medium severity. CVSS v3 base score is 4.6 out of 10.