Samsung Blockchain Keystore 1.3.12.1/1.3.13.5/1.3.16/1.3.16.5 Drawing Pinpad out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Samsung Blockchain Keystore. This affects an unknown part of the component Drawing Pinpad. The manipulation results in out-of-bounds write. This vulnerability is identified as CVE-2025-21021. The attack is only possible with local access. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Samsung Blockchain Keystore. Affected is some unknown functionality of the component Drawing Pinpad. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at security.samsungmobile.com. This vulnerability is traded as CVE-2025-21021 since 11/06/2024. The exploitability is told to be difficult. The attack needs to be approached locally. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.3.17.2 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.9
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 5.7
CNA Vector (SamsungMobile): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Blockchain Keystore 1.3.17.2

Timelineinfo

11/06/2024 🔍
08/06/2025 +272 days 🔍
08/06/2025 +0 days 🔍
08/15/2025 +9 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Confirmed

CVE: CVE-2025-21021 (🔍)
GCVE (CVE): GCVE-0-2025-21021
GCVE (VulDB): GCVE-100-318936

Entryinfo

Created: 08/06/2025 08:13
Updated: 08/15/2025 18:59
Changes: 08/06/2025 08:13 (64), 08/15/2025 18:59 (12)
Complete: 🔍
Cache ID: 216::103

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