---
id: CVE-2026-6205
title: >-
  An external control of file name or path vulnerability in Upload API in
  Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9,
  7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to write
  arbitrary files and c…
summary: >-
  An external control of file name or path vulnerability in Upload API in
  Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9,
  7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to write
  arbitrary files and c…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-73
vendor: Synology
product: DiskStation Manager (DSM)
affected:
  - diskstation_manager_dsm >= 7.4 < 7.4-90075
  - diskstation_manager_dsm >= 7.3.2 < 7.3.2-86009-4
  - diskstation_manager_dsm >= 7.2.2 < 7.2.2-72806-9
  - diskstation_manager_dsm >= 7.2.1 < 7.2.1-69057-12
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:17:21.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-6205'
references:
  - url: 'https://www.synology.com/en-global/security/advisory/Synology_SA_26_13'
    label: security@synology.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:56:51.725125Z'
epss: 0.00318
epssPercentile: 0.24969
ingestedAt: '2026-09-18T08:38:04.115Z'
---

## Overview

An external control of file name or path vulnerability in Upload API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to write arbitrary files and conduct denial-of-service attacks.

## Remediation

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