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Cysic crypto bridge halted after unauthorized mint of 10M CYS

DevelopingCryptoSecurity incidentFirst tracked 2026-10-18Last changed 2026-10-18

Current outcome

The Cysic cross-chain bridge remains paused, the involved address is blacklisted on-chain with about 2.8 million CYS frozen, and the project says the mainnet and user wallet assets were unaffected while a security firm investigates and traces funds.

Progress timeline

2 material updates
  1. #01
    Initial2026-10-18 10:43 · publication time

    Cysic crypto bridge halted after unauthorized mint of 10M CYS

    Cysic suspended its cross-chain bridge after an attacker exploited a processing flaw to mint 10 million CYS on BNB Smart Chain, with the project blacklisting the recipient and restricting transfers of about 2.8 million remaining tokens.

    Source evidence: Cointelegraph

  2. #02
    Response2026-10-18 10:50 · publication time

    【Cysic 跨链桥遭到攻击,黑客未经授权铸造了 1000 万枚 CYS】

    Cysic added that the attack occurred on October 17 after the attacker gained access to a database related to the cross-chain service and submitted false mint messages; the incident was limited to the bridge's message-processing and minting functions, did not affect the Cysic mainnet or existing assets in user wallets, and the team hired a security firm to investigate the attack path and trace funds.

    State after update: The Cysic cross-chain bridge remains paused, the involved address is blacklisted on-chain with about 2.8 million CYS frozen, and the project says the mainnet and user wallet assets were unaffected while a security firm investigates and traces funds.

    Source evidence: foresightnews · theblockbeats

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