---
id: CVE-2026-40535
title: >-
  An improper limitation of a pathname to a restricted directory ('path
  traversal') vulnerability in Desktop API in Synology DiskStation Manager (DSM)
  before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers
  to write …
summary: >-
  An improper limitation of a pathname to a restricted directory ('path
  traversal') vulnerability in Desktop API in Synology DiskStation Manager (DSM)
  before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers
  to write …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-22
vendor: Synology
product: DiskStation Manager (DSM)
affected:
  - diskstation_manager_dsm >= 7.3 < 7.3.2-86009-2
  - diskstation_manager_dsm >= 7.2.2 < 7.2.2-72806-7
  - diskstation_manager_dsm >= 7.2.1 < 7.2.1-69057-10
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:07:38.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40535'
references:
  - url: 'https://www.synology.com/en-global/security/advisory/Synology_SA_26_06'
    label: security@synology.com
tags:
  - nvd
  - cve.org
epss: 0.00434
epssPercentile: 0.3705
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T10:43:06.082634Z'
ingestedAt: '2026-09-18T08:38:04.109Z'
---

## Overview

An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Desktop API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to write limited files and conduct limited denial-of-service attacks.

## Remediation

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