Greek telecoms operator COSMOTE exposed data on around 7 million subscribers, resulting in a 6 million euro fine from the Hellenic data protection authority.

Key facts

• Affected approximately 7 million subscribers.
• Exposed subscriber and call-related data.
• Resulted in a 6 million euro HDPA fine.
• Reinforced regulatory expectations for telecom data protection.

The lesson

Telecom data is rich and sensitive. COSMOTE underscores the regulatory and reputational cost of failing to protect subscriber records.

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