Cyber Attack on Colt: 1 Million Documents Stolen with Sensitive Information

Colt, a major data connectivity provider connecting 900 data centres across Europe, Asia, and North America, has confirmed a cyber attack. The breach was first noticed on 12 August 2025, resulting in the theft of over 1 million documents containing sensitive information. The compromised system was separate from customer infrastructure, and Colt has temporarily taken its support systems offline as a precautionary measure to contain the incident.

Key Takeaways:

• Colt's internal system was breached, resulting in the theft of over 1 million documents, including employee salary data, financial information, customer contracts, personal details of executives and staff, network designs, and software development files.
• The affected system was separate from customer infrastructure.
• Colt has temporarily taken its support systems, including Colt Online and Voice API platform, offline to contain the incident.
• The company has apologized for the inconvenience caused and assured that its teams are working around the clock to restore these services.
• The cyber attack is part of a wider wave against telecoms firms, with Orange and Bouygues Telecom recently being hit.

Statistics:

• 1 million documents were stolen in the cyber attack.
• 900 data centres are connected by the company's network.
• The breach was first noticed on 12 August 2025.
• The affected system was separate from customer infrastructure.
• Colt has temporarily taken its support systems offline.

Sources:

• Colt blog post, 12 August 2025
• Colt statement, 20 August 2025
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