---
id: CVE-2026-40530
title: >-
  An improper neutralization of CRLF sequences ('CRLF injection') vulnerability
  in User 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 authenticated users to read or
  write arb…
summary: >-
  An improper neutralization of CRLF sequences ('CRLF injection') vulnerability
  in User 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 authenticated users to read or
  write arb…
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-93
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-2026-40530'
references:
  - url: 'https://www.synology.com/en-global/security/advisory/Synology_SA_26_06'
    label: security@synology.com
tags:
  - nvd
  - cve.org
epss: 0.00347
epssPercentile: 0.28411
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T10:49:26.410622Z'
ingestedAt: '2026-09-18T08:38:04.112Z'
---

## Overview

An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User 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 authenticated users to read or write arbitrary files and conduct denial-of-service attacks after the system is rebooted.

## Remediation

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