# One Cosmos Software Defect Now Accounts for Three Chain Drains as Exploit Reproductions Pile Up

KiiChain lost about 9.7 million dollars and TAC about 7.5 million dollars through the same Cosmos EVM underflow bug that hit MANTRA, while Term Labs lost 8.5 million dollars to an attacker who simply bought the votes.

- Published: 2026-09-08T05:45:27.037Z
- Canonical: https://polylog.news/crypto/2026-09-08/one-cosmos-software-defect-now-accounts-for-three-chain-drai
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Rekt News](https://www.rekt.news/), [DeFiHackLabs](https://github.com/SunWeb3Sec/DeFiHackLabs/commit/151364ad29ed78b564653f7127f36b5ff72d6b63), [DeFiHackLabs](https://github.com/SunWeb3Sec/DeFiHackLabs/commit/abc23d06b205e2cff4879a27bd45d307abfda263), [DeFiHackLabs](https://github.com/SunWeb3Sec/DeFiHackLabs/commit/7bbfc111620ff865992e640387605c9244ec8939), [Polylog editors](https://polylog.news)

Rekt News has now written up KiiChain, TAC and MANTRA, three networks drained through the same underflow defect in the shared Cosmos EVM codebase. KiiChain said an attacker took 148,326,583 KII across 18 separate attacks on August 22, worth…

This story is for subscribers. Read it in full at https://polylog.news/crypto/2026-09-08/one-cosmos-software-defect-now-accounts-for-three-chain-drai (subscription information: https://polylog.news/pricing).