On May 2021, Value Defi suffered a reentrancy — the first of 51 documented reentrancy incidents in our archive where the loss figure was not publicly disclosed but the exploit pattern is documented below.
Attack Mechanics: How the Value Defi Reentrancy Played Out
Exploit Class Applied to Value Defi
The Value Defi incident on May 8, 2021 is classified as a Reentrancy. A malicious contract re-enters a vulnerable function before state is updated, letting it drain funds multiple times. In the full archive, Value Defi is 1 of 51 documented reentrancy incidents.
Value Defi in Context
The Value Defi incident joins a class whose largest loss to date is Curve (2023) at $41M.
Prior Reentrancy Before Value Defi
The nearest reentrancy incident before Value Defi was LendfMe, 384 days earlier on April 19, 2020 ($25M lost). The same exploit class surfaced again within the reentrancy attack surface.
Value Defi Vulnerability Signature
The primary source categorises the Value Defi exploit specifically as “Cross Contract Reentrancy”. This narrower label is entity-specific: it reflects how the Value Defi contract failed, rather than the broad reentrancy pattern alone.
Impact & Recovery for Value Defi
Value Defi Loss Figure
The loss figure for Value Defi is not publicly disclosed. The primary source reports the exploit in non-USD terms, so no USD estimate is published here. For reference, the average loss across 51 reentrancy incidents in our archive is $2.87M.
Timeline Since the Value Defi Incident
The Value Defi exploit occurred 4.9 years ago (1,802 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for Value Defi
Public post-mortem / on-chain analysis for the Value Defi incident: view source.
FAQ
How much did Value Defi lose?
The Value Defi loss figure is not publicly disclosed. The primary source reports the exploit in non-USD token terms, so no USD estimate is published here.
When did the Value Defi hack happen?
The Value Defi exploit was recorded on May 8, 2021 — 1,802 days ago.
What type of exploit hit Value Defi?
The Value Defi incident is classified as a Reentrancy. A malicious contract re-enters a vulnerable function before state is updated, letting it drain funds multiple times.
How common is the Reentrancy pattern seen at Value Defi?
Our archive contains 51 documented reentrancy incidents. The Value Defi incident is one of them.
How does Value Defi compare to the largest Reentrancy attack?
The largest reentrancy incident in our archive is Curve (2023) at $41M. The Value Defi loss was not publicly disclosed.
Why were specific stock indices selected for the study?
Selected indices represent major affected countries and areas, providing a comprehensive view of the impact.
What was the main finding regarding stock market reactions to COVID-19?
Stock markets experienced significant negative impacts shortly after the outbreak of COVID-19.