Medtronic, a maker of medical devices and implants, has pulled the plug on its internet-based software update system, which security researchers had found had a dangerous security vulnerability The company said in a notice this week that it’s switching off the software distribution network after researchers found that a hacker could update the pacemaker’s software with malicious software that could manipulate the impulses that regulate a patient’s heartbeat. The researchers, Jonathan Butts and Billy Rios, revealed the vulnerability at the Black Hat conference in August, more than a year after first reporting the vulnerability to Medtronic.

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