Newsletter platform Substack notifies users of data breach

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Newsletter platform Substack notifies users of data breach

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Newsletter platform Substack notifies users of data breach

Thu Feb 05 2026

Cybercrime

Privacy

SaaS

www.bleepingcomputer.com

Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. [...]