A cyberattack on a US-based software system provider has disrupted operations at several European airports, extending into a second full day on Sunday. The impact of the breach is poised to worsen for at least one major airport.

The attack which began late Friday, affected electronic check-in systems, causing dozens of cancellations and delays in flights.

Brussels airport hit the hardest

Brussels airport has been impacted most significantly by the cyberattack . As a result, the airlines were asked to cancel nearly 140 departing flights scheduled for Monday, which amounts to half of the total 276 flights. The airport stated that the decision was made because the Collins Aerospace "is not yet able to deliver a new secure version of the check-in system.”

Cancellations and delays at Brus

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