What is CVE-2023-21455?

CVE-2023-21455 is a medium-severity vulnerability in Samsung Exynos, classified under Improper Authentication. CVSS score: 5.9/10. Published 2023-03-16.

How severe is CVE-2023-21455?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2023-21455 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Samsung Exynos

CVE-2023-21455

Improper authorization implementation in Exynos baseband prior to SMR Mar-2023 Release 1 allows incorrect handling of unencrypted message.

Vulnerability class: Broken Authentication

EPSS: 0.004 (32.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.

Affected products

Samsung Exynos
Samsung Exynos_firmware
Samsung Mobile Devices — versions Select devices using Exynos CP chipsets

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

karimhabush/cyberowl

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-21455?: CVE-2023-21455 is a medium-severity vulnerability in Samsung Exynos, classified under Improper Authentication. CVSS score: 5.9/10. Published 2023-03-16.
How severe is CVE-2023-21455?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2023-21455 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.