Cysic halts bridge after unauthorized mint of 10 million CYS tokens

On October 17, 2026, Cysic indefinitely suspended its cross-chain bridge following an unauthorized mint of 10 million CYS tokens on BNB Smart Chain. Although Cysic blacklisted the recipient address shortly after, only 2.8 million tokens were frozen, as remaining tokens were sold or transferred. Cysic confirmed its mainnet and CGT governance token were unaffected, while third-party security experts investigate potential links to unauthorized database access and bridge processing logic.

Unauthorized mint and initial response

• ▪An unauthorized actor minted 10 million CYS tokens on BNB Smart Chain at 12:31:38 UTC on October 17, 2026
• ▪Cysic blacklisted the recipient address of the unauthorized 10 million CYS mint at 13:47:52 UTC on October 17, 2026, freezing approximately 2.8 million tokens
• ▪Cysic indefinitely suspended its cross-chain bridge on October 17, 2026 following an unauthorized CYS token mint, providing no timeline for its return
• ▪On-chain records show that most of the 10 million unauthorized CYS tokens were transferred or sold before Cysic's blacklisting took effect on October 17, 2026

Investigation into the exploit

• ▪Early investigation findings into Cysic's October 17, 2026 exploit indicate a potential link between the unauthorized mint of 10 million CYS tokens, unauthorized database access, and bridge processing logic weaknesses
• ▪Cysic brought in third-party security experts to investigate the October 17, 2026 bridge breach involving the unauthorized CYS mint and track the movement and potential swapping of the exploited CYS tokens

Scope of incident and affected assets

• ▪Cysic described the October 17, 2026 bridge incident involving the unauthorized CYS mint as limited to bridge message processing and token minting, with its mainnet and other operational systems remaining unaffected
• ▪Cysic reported no impact on its CGT governance token from the October 17, 2026 bridge exploit affecting CYS tokens
• ▪Cysic operates a dual-token structure consisting of CYS as its utility token and CGT as its governance token obtained through staking

Tokenomics and market impact

• ▪CYS has a maximum supply of 1 billion tokens and had approximately 160.8 million tokens in circulation following its December 2025 token generation event
• ▪The October 17, 2026 unauthorized mint of 10 million CYS tokens introduced immediate supply dilution for CYS holders relative to the project's 160.8 million circulating supply