# CRITICAL UPDATE Re: DAO Vulnerability

DevFeed: [CRITICAL UPDATE Re: DAO Vulnerability](<https://devfeed.tech/articles/critical-update-re-dao-vulnerability-16764.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2016/06/17/critical-update-re-dao-vulnerability>)

Author: Vitalik Buterin

Published: 2016-06-17T13:20:23Z

Content type: release

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [vulnerability](<https://devfeed.tech/topics/vulnerability.md>), [Exploit](<https://devfeed.tech/topics/exploit.md>), [Transactions](<https://devfeed.tech/topics/transactions.md>)

Tags: [ethereum](<https://devfeed.tech/tags/ethereum.md>), [fork](<https://devfeed.tech/tags/fork.md>), [formal-verification](<https://devfeed.tech/tags/formal-verification.md>), [protocol-announcements](<https://devfeed.tech/tags/protocol-announcements.md>), [re](<https://devfeed.tech/tags/re.md>), [transactions](<https://devfeed.tech/tags/transactions.md>), [verification](<https://devfeed.tech/tags/verification.md>), [vulnerability](<https://devfeed.tech/tags/vulnerability.md>)

## AI overview

The DAO was exploited through a recursive calling vulnerability that allowed an attacker to drain ether into a child DAO. The article states that the vulnerability affected the DAO specifically, not Ethereum itself, and proposes a software fork to prevent withdrawals from the DAO and its children after a specified block.

## Source excerpt

An attack has been found and exploited in the DAO, and the attacker is currently in the process of draining the ether contained in the DAO into a child DAO. The attack is a recursive calling vulnerability,