Medium severity · published Aug 6, 2025
CVE-2025-21021
Out-of-bounds write in drawing pinpad in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to write out-of-bounds memory
6.7
CVSS
0.1%
EPSS
No
On KEV
Description
Out-of-bounds write in drawing pinpad in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to write out-of-bounds memory.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BK
Blockchain Keystore · Samsung
before 1.3.17.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21021
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-21021
Vendor Advisory
https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=08
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