On October 2023, ZS was exploited in a business logic flaw, resulting in approximately $14K in losses. That makes the ZS exploit the 364th largest DeFi incident out of 690 documented in our archive.
Attack Mechanics: How the ZS Business Logic Flaw Played Out
Exploit Class Applied to ZS
The ZS incident on October 8, 2023 is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share. In the full archive, ZS is 1 of 144 documented business logic flaw incidents.
ZS in Context
At $14K, the ZS exploit is a minor (<$1M) event compared to the largest same-class incident in our archive — – EulerFinance (2023) at $200M.
Prior Business Logic Flaw Before ZS
The nearest business logic flaw incident before ZS was DePayRouter, 3 days earlier on October 5, 2023 ($827 lost). The same exploit class surfaced again within the business logic flaw attack surface.
Impact & Recovery for ZS
ZS Loss Figure
The ZS exploit caused $14,000 in losses — a minor (<$1M) incident and the 135th largest of 214 documented in 2023.
Where ZS Sits Among Business Logic Flaw Attacks
Ranked by loss size, ZS is the 79th largest of 144 business logic flaw incidents documented. That puts the ZS loss below the class average of $6.08M.
Timeline Since the ZS Incident
The ZS exploit occurred 2.5 years ago (919 days). The contract, its fork-block, and the attack transaction remain on-chain and forensically reproducible.
Primary Reference for ZS
Public post-mortem / on-chain analysis for the ZS incident: view source.
FAQ
How much did ZS lose?
The ZS exploit in October 2023 resulted in $14,000 in losses — the 135th largest of 214 DeFi incidents that year.
When did the ZS hack happen?
The ZS exploit was recorded on October 8, 2023 — 919 days ago.
What type of exploit hit ZS?
The ZS incident is classified as a Business Logic Flaw. A business-logic bug in the contract — such as an incorrect formula or missing state update — lets the attacker withdraw more than their share.
How common is the Business Logic Flaw pattern seen at ZS?
Our archive contains 144 documented business logic flaw incidents. The ZS incident is one of them.
How does ZS compare to the largest Business Logic Flaw attack?
The largest business logic flaw incident in our archive is – EulerFinance (2023) at $200M. The ZS loss is $14K.
Compared to which other major events is the war's impact analyzed?
The Covid-19 pandemic and the 2008 global financial crisis.
Which machine learning techniques are explored for predicting stock price direction?
ANN and Support Vector Regression (SVR).