A cyberattack using ransomware caused significant disruption at several major European airports, including London Heathrow and Brussels Airport, by targeting automatic check-in and boarding software. The EU's cyber agency ENISA confirmed the use of malicious software and the involvement of law enforcement in the investigation.

• The attack on US software maker Collins Aerospace, impacting its Muse check-in software, was discovered on Friday night.
• The BBC saw internal crisis communications from Heathrow Airport indicating that more than a thousand computers may have been compromised and required in-person recovery.
• Brussels Airport asked airlines to cancel nearly 140 of its 276 scheduled outbound flights for Monday due to the ongoing disruption.