2022 Credit Suisse — 'Suisse Secrets' journalistic leak of historical client-account intelligence
Data compromised
Historical account metadata and beneficial-ownership narratives as described in Guardian and Wikipedia summaries of the consortium package
Technical writeup
A coordinated media investigation led by Süddeutsche Zeitung and Organized Crime Works published the so-called 'Suisse Secrets' trove summarizing tens of thousands of legacy Credit Suisse accounts and aggregate balances, framed as whistleblower-sourced banking records spanning many decades rather than a contemporaneous network intrusion. The bank contested allegations about ongoing business practices while prosecutors and parliamentary inquiries later examined leak-handling and market fallout tied to reputational damage.
Root cause
Unauthorized disclosure of internal client records to investigative journalists (insider / leak vector per project methodology—not a public APT chain)