Some Starbucks workers were left frazzled and frustrated following a ransomware attack on one of the coffee chain's software vendors this week. CNBC reports that as a result of the cyberattack, baristas are having trouble viewing and managing their schedules.

Blue Yonder, which provides supply chain management software for thousands of companies, said a cyberattack had disrupted some services.

A ransomware attack on supply chain vendor Blue Yonder has impacted Starbucks in the U.S. and supermarkets in the U.K. — Here’s what we know so far.