---
id: CVE-2025-21070
title: >-
  Out-of-bounds write in the SPI decoder in Samsung Notes prior to version
  4.4.30.63 allows local attackers to write out-of-bounds memory.
summary: >-
  Out-of-bounds write in the SPI decoder in Samsung Notes prior to version
  4.4.30.63 allows local attackers to write out-of-bounds memory.
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-787
vendor: samsung
product: notes
affected:
  - notes < 4.4.30.63
patched:
  - notes 4.4.30.63
published: '2025-10-10'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T13:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-21070'
references:
  - url: 'https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=10'
    label: mobile.security@samsung.com
tags:
  - nvd
epss: 0.00121
epssPercentile: 0.01731
ingestedAt: '2026-10-08T13:42:55.075Z'
---

## Overview

Out-of-bounds write in the SPI decoder in Samsung Notes prior to version 4.4.30.63 allows local attackers to write out-of-bounds memory.

## Affected

- `notes < 4.4.30.63`

## Remediation

Upgrade past the affected range:

- `notes 4.4.30.63`