Boston Scientific disclosed on Wednesday that an ongoing cyberattack has caused a global disruption to its IT systems and business applications. The incident began on Tuesday, according to an SEC filing, and the company is working with third‑party security experts to contain the threat. No timeline for restoring the affected systems has been provided, and the full scope of operational and financial impacts remains unknown. The breach has led to a decline of more than 4% in Boston Scientific’s share price on Wednesday morning. No group has claimed responsibility, and the company has not confirmed whether the attack involved ransomware or what data may have been accessed.