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

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

Substack, one of the services focused on email newsletters, has now confirmed that their service experienced an incident of user data leakage to third...

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an...

Substack confirms a breach after hacker accessed internal user records now circulating on crime forums, exposing emails, phone numbers, and account...

Photo-sharing platform Flickr is notifying users of a potential data breach after a vulnerability at a third-party email service provider exposed...

Photo-sharing platform Flickr is notifying users of a potential data breach after a vulnerability at a third-party email service provider exposed...

Contact details were accessed in an intrusion that went undetected for months, the blogging outfit says Newsletter platform Substack has admitted that...