West Pharmaceutical Services, an S&P 500 pharmaceutical manufacturer with over $3 billion in annual revenue, disclosed a ransomware-style cyberattack detected on May 4, 2026. Attackers exfiltrated data and encrypted systems, forcing the company to take systems offline globally. Core enterprise systems supporting shipping and manufacturing have been partially restored, but full recovery is incomplete. The company engaged Palo Alto Networks' Unit 42 for incident response. No ransomware group has claimed responsibility, and the full scope of stolen data remains under investigation.
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