Massive streaming service data leak sees over 324 million records breached - here's what we know

• Cybernews found an unprotected database containing sensitive data on millions of MagentaTV users
• Around 324 million logs were contained within
• The database has since been locked down, but users should be on their guard

MagentaTV, a TV and streaming platform owned by German telecommunications giant Deutsche Telekom has been found leaking sensitive customer information for months.

In a blog post, security researchers from Cybernews said in June 2025, it found an unprotected Elasticsearch instance, hosted by Serverside.ai, which is a server-side ad insertion platform.

The archive weighs 729GB, and contains more than 324 million log entries. These entries contained users’ IP addresses, MAC addresses, session IDs, customer IDs, and user agents. Furthermore, some of the logs contained HTTP headers from requests the customers were sending.