Several major airports were hit by cyberattacks, causing operations to be disrupted!
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Civil Aviation Resources Network, September 21, 2025: According to foreign media reports, a cyberattack on a check-in and boarding system provider disrupted operations at several major European airports on Saturday (September 20), including London Heathrow, Europe's busiest airport. The incident caused numerous flight delays and cancellations.
The disruption is the latest in a series of recent hacking attacks targeting governments and businesses worldwide, affecting sectors ranging from healthcare and defense to retail and automotive.
Airports said Saturday's issue primarily focused on MUSE software developed by Collins Aerospace, which provides systems for airlines at numerous airports worldwide.
Heathrow Airport confirmed it was affected. Brussels Airport and Berlin Airport also issued statements confirming the impact. Hours later, Dublin Airport and Cork Airport, Ireland's second-largest airport, reported minor disruptions.
Collins' parent company, RTX, said in an emailed statement that "the impact was limited to electronic check-in and baggage drop, which can be mitigated through manual check-in operations," and that it was working diligently to resolve the issue.
Aviation data provider Cirium reported that as of 11:30 a.m. GMT on September 20, a total of 29 flights were canceled at Heathrow, Berlin, and Brussels airports. The three airports had scheduled 651, 228, and 226 departures, respectively, for Saturday.
Brussels officials reported four flight diversions and "most departures were delayed."
Brussels Airport asked airlines to cancel half of their scheduled departures for Sunday to avoid long queues and last-minute cancellations, suggesting disruptions will continue throughout the weekend.
A European Commission spokesperson said there were no indications of a "large-scale, serious attack" and that the source of the incident was still under investigation.
Such widespread system outages are typically the result of ransomware attacks (cyber extortionists demanding ransom by crippling corporate networks) or deliberate sabotage.
Affected airports advised passengers planning Saturday flights to confirm their itineraries with their airlines before arriving.
Berlin Airport's website stated that check-in wait times were long and that they were seeking a quick solution. Frankfurt Airport, Germany's largest airport, was not affected. EasyJet, one of Europe's largest airlines, said operations were normal and the incident was not expected to affect the remaining flights that day.