Medium severity · published Sep 3, 2025
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
6.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Attack vector
Physical
Complexity
High
Privileges
High
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
Android · Samsung
11.0; 11.0; 11.0; 11.0; 11.0; 11.0; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-21473
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-21473
Vendor Advisory
https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=04
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