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by fastdev 2991 days ago
It seems like Bitcoin network has never been hacked, but distributed applications were hacked with spectacular monetary losses, for example, "The DAO": https://www.coindesk.com/understanding-dao-hack-journalists/

Blockchain technology has different attack vectors like:

* Bugs in smart contracts/DApps

* Bugs in a client software

* Incorrect handling of private keys by users/admins

All these vulnerabilities were exploited numerous times.