CVE-2025-21021: Out-of-bounds write in drawing pinpad in Blockchain Keystore prior to version 1.3.17.2 allows local privileged

Q: How do I fix CVE-2025-21021?

blockchain keystore: upgrade to 1.3.17.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-21021 being exploited?

CVE-2025-21021 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-21021 affect?

CVE-2025-21021 affects blockchain keystore. Severity is medium (CVSS 5.7). 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.

Q: How urgent is CVE-2025-21021?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.7UPGRADE

CVE-2025-21021 is a medium-severity flaw (CVSS 5.7) affecting blockchain keystore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-787
Published	2025-08-06
Last modified	2026-06-17

Publisher (CNA): Samsung Mobile · Vendor: samsung

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-06 05:15 UTCPublished CVE record published
2026-06-17 08:42 UTCUpdated Record last modified

samsung blockchain keystore UPGRADE

Affected: < 1.3.17.2

Fixed in: 1.3.17.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy blockchain-keystore || rpm -q blockchain-keystore || blockchain-keystore --version

2. UPGRADE to 1.3.17.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade blockchain-keystore

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade blockchain-keystore

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-21021?

blockchain keystore: upgrade to 1.3.17.2. Exact commands for each OS are on this page.

Is CVE-2025-21021 being exploited?

CVE-2025-21021 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-21021 affect?

CVE-2025-21021 affects blockchain keystore. Severity is medium (CVSS 5.7). 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.

How urgent is CVE-2025-21021?

Priority 21/100. No elevated risk signals yet.

Software pages

Samsung vulnerabilities

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References

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