Security researchers warn mixing vulnerability disclosures with stock market bets sets a troubling precedent that erodes confidence in the relationship between businesses and white hat hackers who help uncover threats. Researchers are responding to the unprecedented partnership between security research firm MedSec and investment research outfit Muddy Waters LLC. Last week, Muddy Waters released a scathing report based...

Pacemakers, defibrillators and other medical devices made by a leading medical equipment maker are vulnerable to potentially “catastrophic” cyberattacks. With relatively little effort tens of thousands of cardiac devices made by St. Jude Medical are vulnerable to attack, according a report released by private equity firm Muddy Waters Capital with help from medical researchers at...