Hack history / 2021 / Hack or exploit
Arbitrum One
Hack or exploit on Sep 14, 2021 · Security Vulnerability
ONE SOURCE · 1 SOURCE
Lost
undisclosed
dollars at the time
Returned
none listed
as the sources state it
Rank
not ranked
collapses, frauds and later news are not ranked
What happened
The expansion of the Ethereum network, Arbitrum One, released a report on network failures. Beginning at 10:14 on September 14th, EST, Arbitrum One was out of service for 45 minutes, during which time the Arbitrum Sequencer was offline, and funds were never at risk. The root cause of the downtime was a bug that caused the Sequencer to get stuck when receiving a large number of transactions in a short period of time. The Arbitrum team has located the problem and deployed a fix. The team also stated that even if the Sequencer fails, it will not affect the continuous operation of the network. Users can bypass the Sequencer and submit transactions directly to Ethereum.
Details
- Date
- Sep 14, 2021
- Kind
- Hack or exploit
- Method
- Security Vulnerability
- How in
- Smart contract bug
- Target
- not stated
- Chains
- Ethereum
Reported by
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Cite this page
SwanBluechip, "Arbitrum One hack, Sep 14, 2021: undisclosed lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htad1d50e727/ (data as of 2026-10-31).