---
id: CVE-2026-34009
title: >-
  An improper isolation or compartmentalization vulnerability has been reported
  to affect Notes Station 3
summary: >-
  An improper isolation or compartmentalization vulnerability has been reported
  to affect Notes Station 3. If a local attacker gains an administrator account,
  they can then exploit the vulnerability to compromise the security of the
  system…
severity: high
cvss: 8.4
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-653
vendor: QNAP Systems Inc.
product: Notes Station 3
affected:
  - notes_station_3 >= 3.9.x < 3.9.11
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T10:17:13.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34009'
references:
  - url: >-
      https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas
    label: security@qnapsecurity.com.tw
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-15T09:59:33.285Z'
---

## Overview

An improper isolation or compartmentalization vulnerability has been reported to affect Notes Station 3. If a local attacker gains an administrator account, they can then exploit the vulnerability to compromise the security of the system.

We have already fixed the vulnerability in the following version:
Notes Station 3 3.9.11 and later

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.