Several medical device manufacturers released security advisories this week following reports that the notorious WannaCry ransomware has infected some medical devices.

The WannaCry ransomware, also known as Wanna Decryptor, WanaCrypt0r, WannaCrypt, Wana Decrypt0r and WCry, leverages a couple of exploits allegedly developed by the NSA and leaked recently by a hacker group called Shadow Brokers. The threat has hit hundreds of thousands of systems worldwide, including ones housed by banks, hospitals, ISPs, government agencies, transportation companies and manufacturing plants.

Britain’s National Health Service (NHS) was among the worst hit by the malicious campaign, and the incident clearly showed the risk posed by WannaCry to healthcare organizations. However, initial reports suggested that the malware had mainly affected management systems.

The U.S.-based Health Information Trust Alliance (HITRUST) later reported seeing evidence of Bayer (Medrad), Siemens and other medical devices getting infected with WannaCry. Bayer confirmed for Forbes that two of its customers in the United States had informed it about ransomware infections.

Since many medical devices run on Windows and they are connected to the local network, they can easily get infected with WannaCry.

ICS-CERT has provided a list of vendors that have released security advisories to warn customers of the risks and provide them with recommendations on how to prevent attacks.

The list includes Rockwell Automation, BD (Becton, Dickinson and Company), Schneider Electric, ABB, Siemens, General Electric, Philips, Smiths Medical, Johnson & Johnson, and Medtronic. Some of these vendors have also issued warnings about the threat posed to their industrial products.

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