
C3RB3R Ransomware Is Encrypting Synology NAS Devices — Here Is What You Need to Know
In late October 2026, Synology issued an urgent advisory warning customers that threat actors were actively exploiting a critical remote-code-execution vulnerability (CVE-2024-10441, patched December 2024) in unpatched DiskStation Manager (DSM) software to deploy C3RB3R ransomware against internet-exposed NAS devices. Attackers encrypted victim data and appended a .L0CK3D extension, then demanded thousands of dollars for a decryption tool sold via a dark-web portal. With Shadowserver tracking over 380,000 internet-facing Synology NAS devices, the attack surface is substantial, and user reports on Reddit and BleepingComputer forums confirmed widespread infections well before Synology's formal advisory. C3RB3R (also called CerberImposter) has a documented history of pivoting from enterprise servers—Atlassian Confluence and GitLab—to edge storage appliances, demonstrating ransomware operators' strategy of targeting high-value, often-neglected network perimeter devices. The campaign underscores how unpatched NAS gear exposed directly to the internet continues to be a reliable ransomware entry point, elevating urgency for patch discipline and perimeter access controls across all industries.
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