CVE-2023-21473

Name: CVE-2023-21473
Creator: NVD / NIST
Published: 2025-09-03T06:15:40.933+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.21%

Last modified Jun 17, 2026

CVE-2023-21473 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. Improper input validation with Exynos Fastboot USB Interface prior to SMR Apr-2023 Release 1 allows a physical attacker to execute arbitrary code in bootloader.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

Improper input validation with Exynos Fastboot USB Interface prior to SMR Apr-2023 Release 1 allows a physical attacker to execute arbitrary code in bootloader.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

EPSS Probability

0.21%

11.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Samsung	Android	11.0
Samsung	Android	12.0
Samsung	Android	13.0

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=04Vendor Advisory

Timeline

Published: Sep 3, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-21473?

Improper input validation with Exynos Fastboot USB Interface prior to SMR Apr-2023 Release 1 allows a physical attacker to execute arbitrary code in bootloader.

How severe is CVE-2023-21473?

CVE-2023-21473 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21473?

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-2023-21473?

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

Scan your code now

Source: NVD / NIST