Russian national flag carrier Aeroflot was forced to cancel dozens of flights on Monday, disrupting travel across the world's biggest country, as two pro-Ukraine hacking groups claimed to have inflicted a crippling cyberattack.

A program to share information with cybersecurity companies may have exposed unpatched flaws in the company’s SharePoint service.

A hacker group named Silent Crow has claimed responsibility for a large-scale attack on Aeroflot's IT infrastructure, allegedly conducted in cooperation with the Belarusian opposition hacktivist group,