Cyber Risks · Cisco Talos

REvil ransomware actors attack Kaseya in supply chain attack

Summary: Attackers exploited Kaseya VSA endpoint monitoring software through a malicious automatic update to conduct a supply chain attack on Managed Service Providers, delivering REvil/Sodinokibi ransomware that encrypted systems and disrupted operations. Cisco Talos noted organizations using Kaseya VSA may have been compromised even without a successful ransomware deployment, and that backup servers are often targeted in such attacks.

Bottom line: Kaseya's own guidance was to immediately shut down VSA servers because one of the attacker's first actions is to cut off administrative access - meaning the tool you use to manage customer environments can be turned against you before you can respond.

Read the original at Cisco Talos ↗

Topics
Supply Chain & AppSec
Related
Kitesurf is now open source Cyber Risks · Nov 13, 2026