CVE-2025-21018

Privileged memory disclosure via improper input validation

Published Aug 6, 2025 · Updated Aug 6, 2025

Out-of-bounds read in Samsung Blockchain Keystore before 1.3.17.2 allows local users with elevated privileges to read memory outside intended bounds. Samsung identifies improper input validation but has not disclosed the affected routine, input format, or exact out-of-range operation. Exploitation requires local high privileges and exposes memory confidentiality without reported modification or service interruption.

CVSS severity4.4
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Samsung Blockchain Keystore before 1.3.17.2 allows local users with elevated privileges to read memory outside intended bounds. Samsung identifies improper input validation but has not disclosed the affected routine, input format, or exact out-of-range operation. Exploitation requires local high privileges and exposes memory confidentiality without reported modification or service interruption.

The record

CVE
CVE-2025-21018
Published
Aug 6, 2025
Updated
Aug 6, 2025
Vendor
Samsung Electronics
Product
Samsung Blockchain Keystore
Classifications
CWE-125, T1533
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics · Samsung Blockchain KeystoreAffected versions are unavailable in this record.

Published CVSS scores

4.4Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1533Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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