---
id: CVE-2026-21107
title: >-
  Out-of-bounds write in Samsung Notes prior to version 4.4.45.5 allows local
  attackers to write out-of-bounds memory.
summary: >-
  Out-of-bounds write in Samsung Notes prior to version 4.4.45.5 allows local
  attackers to write out-of-bounds memory.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-787
vendor: samsung
product: notes
affected:
  - notes < 4.4.45.5
patched:
  - notes 4.4.45.5
published: '2026-09-09'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:19:33.967'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21107'
references:
  - url: 'https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=09'
    label: mobile.security@samsung.com
tags:
  - nvd
  - cve.org
epss: 0.00094
epssPercentile: 0.00577
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T20:24:09.602799Z'
scores:
  nvd: 5.5
  cna: 6.9
ingestedAt: '2026-09-09T05:00:01.752Z'
---

## Overview

Out-of-bounds write in Samsung Notes prior to version 4.4.45.5 allows local attackers to write out-of-bounds memory.

## Affected

- `notes < 4.4.45.5`

## Remediation

Upgrade past the affected range:

- `notes 4.4.45.5`