CVE-2025-20900

Memory corruption via improper input validation

Published Feb 4, 2025 · Updated Feb 4, 2025

Out-of-bounds write in Samsung Blockchain Keystore before 1.3.16.5 allows local users with high privileges to modify memory. The affected input-processing locus is undisclosed; Samsung states that missing input validation permits writes beyond the intended memory boundary. Exploitation requires local high-privilege access on a supported Galaxy device and can corrupt Keystore memory, with no vendor claim of code execution.

CVSS severity6.3
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 write in Samsung Blockchain Keystore before 1.3.16.5 allows local users with high privileges to modify memory. The affected input-processing locus is undisclosed; Samsung states that missing input validation permits writes beyond the intended memory boundary. Exploitation requires local high-privilege access on a supported Galaxy device and can corrupt Keystore memory, with no vendor claim of code execution.

The record

CVE
CVE-2025-20900
Published
Feb 4, 2025
Updated
Feb 4, 2025
Vendor
Samsung Electronics
Product
Samsung Blockchain Keystore
Classifications
CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 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

6.3Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-787Out-of-bounds Write

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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