As many as 13 security vulnerabilities have been discovered in the Nucleus TCP/IP stack, a software library now maintained by Siemens and used in three billion operational technology and IoT devices that could allow for remote code execution, denial-of-service (DoS), and information leak. Collectively called "NUCLEUS:13," successful attacks abusing the flaws can "result in devices going offline
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http://dlvr.it/SCJDL0