Hundreds of servers in US public schools are vulnerable to ransomware such as Eternal Blue or RobbinHood , remaining un - patched for years after the worldwide virus infection . But cities aren't the only highly vulnerable targets to be found by would-be attackers. Researchers found a Microsoft Windows ' protocol remained open to attack , despite emergency patches issued by the software giant , prompting speculation about what other vulnerability may exist .
Hundreds of servers in US public schools are vulnerable to ransomware such as Eternal Blue or RobbinHood , remaining un - patched for years after the worldwide virus infection . Researchers found a Microsoft Windows ' protocol remained open to attack , despite emergency patches issued by the software giant , prompting speculation about what other vulnerability may exist .