---
id: CVE-2026-40531
title: >-
  An integer overflow or wraparound vulnerability in File Operation 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 conduct limited
  denial-of-service attacks.
summary: >-
  An integer overflow or wraparound vulnerability in File Operation 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 conduct limited
  denial-of-service attacks.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-190
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: '2026-09-18T20:17:15.743'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40531'
references:
  - url: 'https://www.synology.com/en-global/security/advisory/Synology_SA_26_06'
    label: security@synology.com
tags:
  - nvd
  - cve.org
epss: 0.00437
epssPercentile: 0.35331
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T19:09:17.165295Z'
ingestedAt: '2026-09-18T08:38:04.111Z'
---

## Overview

An integer overflow or wraparound vulnerability in File Operation 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 conduct limited denial-of-service attacks.

## Remediation

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