Substack did not specify the number of users affected by the data breach
Tag: Substack
AI, BreachForums, cyber attack, cyber attacks, Data Breaches, Global Security News, Security
Substack Breach: 662,752 User Records Leaked on Cybercrime Forum
Substack confirms a breach after hacker accessed internal user records now circulating on crime forums, exposing emails, phone numbers, and account metadata.
AI, Cyberattacks, Cybercrime, Data Breach, Security, Data Breaches, Exploits, Global Security News, privacy
Substack data breach leaks users’ email addresses and phone numbers
Substack, a high-profile publishing platform widely used by academics, journalists, subject matter experts, and controversialists, has suffered a data breach affecting an unknown number of its creators and subscribers. According to emails sent out this week to some users, on February 3 the company “identified evidence” that a third party had exploited an unspecified weakness…
AI, Cybercrime, data breach, Data Breaches, Global Security News, hacking, hacking news, Uncategorized
Hacker claims theft of data from 700,000 Substack users; Company confirms breach
Substack confirmed a data breach after a hacker leaked data from nearly 700,000 users, including email addresses and phone numbers. Substack is an online platform for publishing email‑based newsletters and blogs, with built‑in paid subscriptions and basic analytics. It’s free to start; creators pay a fee on paid plans. In 2026 it’s estimated to serve…
AI, Data Breaches, Global Security News, Security
Newsletter platform Substack notifies users of data breach
Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. […]