CVE-2026-40531

Medium

Description

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductDiskStation Manager (DSM)

PublishedSep 18, 2026

First seenSep 18, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

Synology DiskStation Manager (DSM)7.3.2-86009-2, 7.2.2-72806-7, 7.2.1-69057-10 or later

Vendor advisories

synology.com/en-global/security/advisory/Synology_SA_26_06

Affected products

Product	Affected versions	Fixed in
Synology DiskStation Manager (DSM)	7.3 ≤ v < 7.3.2-86009-2, 7.2.2 ≤ v < 7.2.2-72806-7, 7.2.1 ≤ v < 7.2.1-69057-10	7.3.2-86009-2, 7.2.2-72806-7, 7.2.1-69057-10

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