One of the most disruptive cyber incidents to have hit Europe's aviation sector in recent years was a crippling ransomware attack that occurred on September 19, 2025, causing widespread chaos throughout the continent's airports.
The disruption was not caused by adverse weather, labour unrest or mechanical failure but by a digital breakdown at the heart of the industry's technological core.
The Collins Aerospace MUSE platform, which is used for passenger check-ins and baggage operations at major airport hubs including Heathrow, Brussels, Berlin, and Dublin, unexpectedly went down, leading airports to revert to paper-based, manual procedures.
There was confusion in the terminals and gate agents resorted to handwritten manifests and improvised coordination methods to handle the surge, while thousands of passengers stranded in transit faced flight cancellations and delays.
While flight safety systems remained unaffected, and a suspect (a British national) was apprehended within a few days of the attack, it also exposed an increasingly frightening vulnerability in aviation's growing reliance on interconnected digital infrastructure.
This ripple effect revealed how one breach of security could cause shockwaves throughout the entire ecosystem of insurers, logistics companies, and national transport networks that are all intertwined with the digital backbone of air travel itself, far beyond an aviation issue.
In the aftermath of the Collins Aerospace cyberattack, the crisis became worse when on Sunday, a group linked to Russian intelligence and known as the Everest Group claimed to have accessed sensitive passenger information allegedly stolen by Dublin Airport and claimed to have been possessed by the group. This group, which operates on the dark web, announced that they had acquired 1.5 million passenger records and threatened to release the data unless a ransom was paid by Saturday evening before releasing the data.
It has been reported that Everest, which had earlier claimed credit for breaching systems connected to Collins Aerospace's MUSE software on October 17, believes that the security breach occurred between September 10 and 11, using credentials obtained from an insecure FTP server in order to infiltrate the company's infrastructure.
On September 19, Collins Aerospace shut down affected servers that blocked cybercriminals from accessing these servers, according to the cybercriminals who claimed their access to those servers was later stopped. This move occurred simultaneously with a wide array of operational outages in major European airports including Heathrow, Berlin Brandenburg, Brussels, and Dublin.
A spokesperson for the Dublin Airport Authority (DAA) confirmed that a probe has been initiated in response to the mounting concerns regarding the incident, as well as in coordination with regulators and impacted airlines.
It should be pointed out that as of yet no evidence has been found of a direct hacking attack on DAA's internal systems, indicating that the dataset exposed primarily consists of details regarding passenger boarding for flights departing Dublin Airport during the month of August.
While this happened, ENISA, the European Union Agency for Cybersecurity, categorised the Collins Aerospace hack as a ransomware attack, which underlined the escalation of sophistication and reach of cybercriminals targeting critical aviation infrastructure across the globe.
There have been signs of gradual recovery as European airports have struggled to regain operational stability since the Collins Aerospace cyber incident.
Although challenges persisted throughout the days of the cyberattack, signs of gradual recovery did emerge. While flight schedules at London's Heathrow airport and Berlin Brandenburg airport had begun to stabilize on Sunday, Brussels Airport continued to experience significant disruptions.
A statement issued by Brussels Airport on Monday stated that it had requested airlines cancel about half of the 276 departures scheduled for Monday due to the non-availability of Collins Aerospace's new secure check-in software, which had not been available for the previous few days.
As manual check-in procedures remained in place, the airport warned that cancellations and delays were likely to continue until full digital functionality had been restored.
In spite of the ongoing disruptions, airport authorities reported that roughly 85% of weekend flights operated, which was made possible by ensuring additional staffing from airline partners and ensuring that the online check-in and self-service baggage system were still operational, according to Airport Authority reports.
The airport’s spokesperson Ihsane Chioua Lekhli explained that the cyberattack impacted only the computer systems being used at the counters staffed by employees, and that in order to minimize the inconvenience to passengers, backup processes and even laptops have been used as workarounds.
It is important to note that RTX Corporation, the parent company of Collins Aerospace, refused to comment on this matter in a previous statement issued on Saturday, when RTX Corporation acknowledged the disruption and said it was working to fully restore its services as soon as possible. According to the company, the impact will only be felt by electronic check-in and baggage drop and can be minimized by manual operations.
During the weekend, Heathrow and Brandenburg airports both encouraged passengers to check their flight statuses before arriving at the airport, as well as to take advantage of online or self-service options to cut down on traffic. In its latest communication, Heathrow Airport stated that it was working with airlines "to recover from Friday's outage," stressing that despite the delays, a majority of scheduled flights were able to run throughout the weekend despite the delay.
There has been a broader discussion around the fragility of digital supply chains and the increasing risk that comes with vendor dependency as a result of the Collins Aerospace incident. Increasingly, ransomware and data extortion groups are exploiting third-party vulnerabilities in order to increase the likelihood of a systemic outage, rather than an isolated cyber event.
An analysis by industry analysts indicates that the true differentiator between organizations that are prepared, visible, and quick to respond during such crises lies in their ability to deal with them quickly, and in the ability to anticipate problems before they arise. According to Resilience's cybersecurity portfolio, only 42% of ransomware attacks in 2025 were followed by incurred claims, a significant decrease from 60% in 2024.
According to experts, this progress is largely due to the adoption of robust backup protocols, periodic testing, and well-defined business continuity frameworks, which are the foundation of this improvement. However, broader industry figures paint a more worrying picture.
Approximately 46% of organizations that have been affected by ransomware opted to pay ransoms to retrieve data, according to Sophos' State of Ransomware report, while in the Resilience dataset, the number of affected organizations paid ransoms fell from 22% in 2024 to just 14% in 2025.
This contrast illustrates the fact that companies that have tested recovery capabilities are less likely to succumb to extortion demands because they have viable options for recovering their data.
A new approach to cybersecurity has emerged – one that is based on early detection, real-time threat intelligence, and preemptive mitigation. Eye Security uncovered a critical vulnerability in Microsoft SharePoint in July 2025 and issued targeted alerts in response to the vulnerability. This proactive approach enabled Eye Security to scan its client ecosystem, alert its clients, and contain active exploitation attempts before significant damage could occur.
According to experts, Collins Aerospace's breach serves as a lesson for what happens when critical vendors fail in a network that is interconnected. A recent outage that crippled airports across Europe was more than just an aviation crisis; it was an alarming reminder of the concentration risk that cloud-based and shared operating technologies carry across industries as well.
Organizations are increasingly reliant on specialized vendors to manage essential systems in order to ensure their success, so the question isn't if a major outage will occur again, but whether businesses have the resilience infrastructure to stay operational if it happens again. It is clear from the Collins Aerospace incident that cybersecurity is no longer a separate IT concern, but rather a core component of operational continuity.
It stands as a defining moment for digital resilience in the evolving narrative.
The emphasis in navigating this era of global infrastructure disruption must shift to building layered defense ecosystems, combining predictive intelligence, rigorous vendor vetting, and a real-time crisis response framework, as businesses navigate through the challenges of a single vendor outage disrupting global infrastructure.
In the end, the lesson is clear: resilience is not built when disruption happens but in anticipation of it, ensuring that when the next digital storm hits, we are prepared, not panicked.
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