---
id: CVE-2026-13666
title: >-
  An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability
  in Sharing 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 wri…
summary: >-
  An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability
  in Sharing 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 wri…
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-93
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: '2026-09-18T20:17:07.373'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13666'
references:
  - url: 'https://www.synology.com/en-global/security/advisory/Synology_SA_26_13'
    label: security@synology.com
tags:
  - nvd
  - cve.org
epss: 0.00249
epssPercentile: 0.14406
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:10:49.926529Z'
ingestedAt: '2026-09-18T08:38:04.114Z'
---

## Overview

An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability in Sharing 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 limited files when a victim clicks a sharing URL.

## Remediation

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