Siemens Healthcare and Becton Dickinson issued advisories following the WannaCry ransomware attack.

Siemens said it is developing patches for medical devices that may have been affected. BD said it is “actively monitoring” the ransomware situation and listed 50 products potentially affected by the attack.

Bayer also confirmed some of its devices may have been affected by the attack. Bayer spokesperson Steven Immergut said that if hospitals’ networks were compromised by the ransomware, it may have affected Bayer Windows-based devices connected to the network, including Medrad Stellant and Medrad MRXperion control room units.

Immergut also said Bayer had received two reports from customers in the U.S. whose Bayer devices were affected.