Out-of-bounds Read in Samsung Blockchain Keystore

CVE-2025-21018

Out-of-bounds read in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to read out-of-bounds memory.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (3.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-21018: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-21018?
CVE-2025-21018 is a medium-severity vulnerability in Samsung Blockchain Keystore, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2025-08-06.
How severe is CVE-2025-21018?
Medium severity. CVSS v3 base score is 4.4 out of 10.