CrowdStrike makes software to help firms manage their security in IT environments.Sopa Images | Lightrocket | Getty ImagesCybersecurity firm CrowdStrike saw its shares plunge Friday, after an update led to a major outage, impacting businesses across the world.Shares of the company, which makes software to help firms manage their security in IT environments, opened down more than 14%, and closed down about 11%.Addressing the incident Friday morning, CrowdStrike CEO George Kurtz said the issues we...