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FulcrumSec Breaches Manchester Airport Group, Leaks 550GB of PII

FulcrumSec Breaches Manchester Airport Group, Leaks 550GB of PII

First seen 2 Sep 2026, 08:44 UTC • •

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ThreatCluster AI
ThreatCluster •September 3, 2026 at 07:59 UTC
  • •FulcrumSec leaked 550GB of data from Manchester Airport Group, affecting 8.7 million customers.
  • •Attackers exploited exposed admin keys in frontend JavaScript on MAG's websites.
  • •MAG has not responded since the initial breach announcement on August 27.

FulcrumSec has claimed responsibility for a significant data breach affecting the Manchester Airport Group (MAG), leaking nearly all of the 550GB of stolen data online. The breach reportedly includes personal identifiable information (PII) of approximately 8.7 million customers, such as names, email addresses, and mobile numbers. The attackers gained initial access through exposed admin keys found in the frontend JavaScript of MAG's websites. The leaked data also encompasses nearly 1.2 billion marketing events and detailed records of customer bookings. FulcrumSec stated that MAG declined to pay a ransom to protect the data, leading to the public leak. As of now, MAG has not provided any updates since their initial post on August 27. The breach poses a risk for follow-on phishing attacks targeting the affected individuals.

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Timeline

2026-08-27
MAG announces data breach
Manchester Airport Group confirmed a data breach but provided limited details on the incident.
Infosecurity-Magazine
2026-08-31
FulcrumSec claims responsibility
FulcrumSec claimed responsibility for the breach and leaked the data online, revealing extensive customer information.
Hackread
2026-09-02
Data leak confirmed
FulcrumSec's leak includes 549GB of PII and other sensitive data, posing risks for phishing attacks.
Infosecurity-Magazine

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