CVE-2023-21455

Name: CVE-2023-21455
Creator: NVD / NIST
Published: 2023-03-16T21:15:11.967+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2023-21455 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Improper authorization implementation in Exynos baseband prior to SMR Mar-2023 Release 1 allows incorrect handling of unencrypted message.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.40%

32.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Samsung	Exynos Firmware	All versions

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=03Vendor Advisory
https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=03Vendor Advisory

Timeline

Published: Mar 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21455?

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

How severe is CVE-2023-21455?

CVE-2023-21455 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21455?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-21455?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST