CVE-2026-13639: Critical severity Synology DiskStation Manager (DSM) vulnerability
Published Sep 18, 2026
·Updated
An insufficient entropy vulnerability in login logic 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 attackers to read or write arbitrary files and conduct denial-of-service attacks.
Affected Software
1 affected component
Synology DiskStation Manager (DSM)<7.2.1-69057-12, <7.2.2-72806-9, <7.3.2-86009-4, <7.4-90075
Event History
Sep 18, 2026
CVE Published
via MITRE·08:21 AM
Data Sourced
via MITRE·08:21 AM
DescriptionSeverityWeakness
Frequently Asked Questions
1
Which DSM releases need to be updated?
DSM versions before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075 are affected. Systems on those release lines should be updated to at least the listed build for their line.
2
Does exploitation require authentication or user interaction?
No. The vulnerability is remotely exploitable with low attack complexity and requires neither privileges nor user interaction.
3
What could a successful attacker do?
A remote attacker could read or write arbitrary files and cause denial-of-service conditions. The reported impact includes high confidentiality, integrity, and availability effects.