Out-of-bounds write in Samsung Blockchain Keystore - CVE-2025-21021
Published: August 5, 2025
Vulnerability identifier: #VU113645
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-21021
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in drawing pinpad. A local user can out-of-bounds write and execute arbitrary code on the target system.
Affected software
Samsung Blockchain Keystore
How to mitigate CVE-2025-21021
Install updates from vendor's website.
Samsung Blockchain Keystore - update to 1.3.17.2