What is CVE-2025-21017?

CVE-2025-21017 is a medium-severity vulnerability in Samsung Blockchain Keystore, classified under Out-of-bounds Write. CVSS score: 6.3/10. Published 2025-08-06.

How severe is CVE-2025-21017?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Buffer overflow in Samsung Blockchain Keystore

CVE-2025-21017

Out-of-bounds write in detaching crypto box in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to write out-of-bounds memory.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (4.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L.

Affected products

Samsung Blockchain_keystore
Samsung Mobile Blockchain Keystore — versions 1.3.17.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-21017?: CVE-2025-21017 is a medium-severity vulnerability in Samsung Blockchain Keystore, classified under Out-of-bounds Write. CVSS score: 6.3/10. Published 2025-08-06.
How severe is CVE-2025-21017?: Medium severity. CVSS v3 base score is 6.3 out of 10.