C3RB3R ransomware actively targeting Synology NAS devices

Mon, 02 Nov 2026 20:44:36 +0000

Engineer — Act: Active ransomware campaign with a vendor advisory to update immediately — patch Synology NAS firmware to the latest release now if any Synology devices are in your environment, and verify no existing encryption activity on attached shares.
SOC/IR — Act: Active ransomware campaign against internet-exposed NAS devices warrants an immediate sweep — hunt for anomalous file-modification bursts on SMB/NFS shares and check NAS device logs for unauthorized access since the campaign began; request Synology-specific IOCs if not yet available from your threat intel feed.
Leader — Plan: Confirm whether Synology NAS is present in your environment and ensure the engineering team has prioritized patching; ransomware on file storage puts backups and critical shares at risk, which could escalate to a material incident if unaddressed this week.

Synology on CuraSec