More than $3.1 billion in crypto has been lost in the first half of 2025 due to issues including smart-contract bugs, access-control vulnerabilities, rug pulls and scams, according to a report from blockchain security auditor Hacken.
This figure already
This evolving landscape highlights a crucial vulnerability: Access control in crypto remains one of the most underdeveloped and high-risk areas, despite growing technical safeguards.
DeFi and smart contracts expose vulnerabilities
Operational security flaws were responsible for the majority of the losses, with $1.83 billion stolen across both decentralized finance (DeFi) and centralized finance (CeFi) platforms.
