---
title: "CVE-2026-6205: Synology DiskStation Manager - Unrestricted File Upload"
description: "Synology DiskStation Manager (DSM) < 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075 contains an unrestricted file write vulnerability caused by external control of file name or path in Upload API, letting remote authenticated users write arbitrary files and cause denial of service."
url: https://panop.io/threat-heartbeat/CVE-2026-6205/
---

# CVE-2026-6205 Synology DiskStation Manager - Unrestricted File Upload

Synology DiskStation Manager (DSM) < 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075 contains an unrestricted file write vulnerability caused by external control of file name or path in Upload API, letting remote authenticated users write arbitrary files and cause denial of service.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.52% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-6205)

## Details

Type

Unrestricted File Upload

Impact

File System Write, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-73](https://cwe.mitre.org/data/definitions/73.html)

## Vendor fix

Update to versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, 7.4-90075 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-6205](https://nvd.nist.gov/vuln/detail/CVE-2026-6205)
- [https://www.synology.com/en-global/security/advisory/Synology\_SA\_26\_13](https://www.synology.com/en-global/security/advisory/Synology_SA_26_13)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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