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300 Million Stolen Credentials from Proton Available on Dark Web

First seen 10 Nov 2025, 11:52 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Proton has reported that 300 million stolen login credentials are being sold on dark web marketplaces. This breach affects users of Proton's services, with login details being circulated among cybercriminals. The incident highlights the ongoing issue of credential theft and the risks associated with compromised accounts.

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