A ransomware attack on a Florida-based software management firm impacted some 200 companies and is being investigated by federal authorities. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) said on Twitter that it “is taking action to understand and address the supply-chain ransomware attack against Kaseya,” and several managed service providers that use the company’s software. Kaseya alerted its customers at 2 p.m. EDT on Friday about a “potential attack” against its VSA software. “We are experiencing a potential attack against the VSA that has been limited to a small number of on-premise customers,” the brief alert said. “We are in the process of investigating the root cause of the incident with an abundance of caution but we recommend that you IMMEDIATELY shut down your VSA server until you receive further notice from us,” the notice continued. “It’s critical that you do this immediately because one of the first things …