CVE-2015-2809: Synology Diskstation Manager

Medium severity, CVSS 5.0. EPSS: 3.5% chance of exploitation in the next 30 days.

The Multicast DNS (mDNS) responder in Synology DiskStation Manager (DSM) before 3.1 inadvertently responds to unicast queries with source addresses that are not link-local, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets to the Avahi component.

Affected products

• Synology Diskstation Manager: up to and including 3.0

Published 2015-04-01. Last modified 2026-06-17.