shield Other · $50 loss

The April 28, 2021 Uranium unclassified exploit: where $50 went

On April 2021, Uranium was exploited in a other, resulting in approximately $50 in losses. That makes the Uranium exploit the 454th largest DeFi incident out of 690 documented in our archive.

Attack Mechanics: How the Uranium Other Played Out

Exploit Class Applied to Uranium

The Uranium incident on April 28, 2021 is classified as a Other. A specific exploit class outside the most common buckets. In the full archive, Uranium is 1 of 188 documented other incidents.

Uranium in Context

At $50, the Uranium exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — MIMSpell (2024) at $65M.

Prior Other Before Uranium

The nearest other incident before Uranium was Sushi Badger Digg, 93 days earlier on January 25, 2021. The same exploit class surfaced again within the other attack surface.

Uranium Vulnerability Signature

The primary source categorises the Uranium exploit specifically as “Miscalculation”. This narrower label is entity-specific: it reflects how the Uranium contract failed, rather than the broad other pattern alone.

Impact & Recovery for Uranium

Uranium Loss Figure

The Uranium exploit caused $50 in losses — a minor (<$1M) incident and the 11th largest of 37 documented in 2021.

Where Uranium Sits Among Other Attacks

Ranked by loss size, Uranium is the 106th largest of 188 other incidents documented. That puts the Uranium loss below the class average of $2.03M.

Timeline Since the Uranium Incident

The Uranium exploit occurred 5 years ago (1,812 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.

Primary Reference for Uranium

Public post-mortem / on-chain analysis for the Uranium incident: view source.

FAQ

How much did Uranium lose?

The Uranium exploit in April 2021 resulted in $50 in losses — the 11th largest of 37 DeFi incidents that year.

When did the Uranium hack happen?

The Uranium exploit was recorded on April 28, 2021 — 1,812 days ago.

What type of exploit hit Uranium?

The Uranium incident is classified as a Other. A specific exploit class outside the most common buckets.

How common is the Other pattern seen at Uranium?

Our archive contains 188 documented other incidents. The Uranium incident is one of them.

How does Uranium compare to the largest Other attack?

The largest other incident in our archive is MIMSpell (2024) at $65M. The Uranium loss is $50.

What type of signature scheme is crucial for the proposed cross-chain transaction protocol?

The adaptor signature scheme is crucial for establishing secret communication channels between parties.

How does blockchain technology contribute to the digital economy?

Blockchain technology supports the digital economy by facilitating secure and transparent digital transactions, enabling smart contracts, and fostering innovation.