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BTC $96,420 +2.34% ETH $3,280 +1.82% SOL $185.40 -0.92% BNB $642.50 +0.45% XRP $2.18 +3.12% DOGE $0.082 -1.50% ADA $1.05 +0.80% AVAX $42.10 +1.15%
10/19/2026

Cysic Suspends Bridge After $727,000 Token Mint Exploit

What happened: On October 17-18, an attacker exploited Cysic’s bridge infrastructure, minting 10 million CYS tokens and selling 7.

Cysic Suspends Bridge After $727,000 Token Mint Exploit

What happened: On October 17-18, an attacker exploited Cysic’s bridge infrastructure, minting 10 million CYS tokens and selling 7.2 million for approximately $727,000, which was then bridged to Ethereum. The exploit stemmed from unauthorized database access and a compromised bridge message. Cysic blacklisted the attacker’s address within 76 minutes, freezing the remaining 2.8 million tokens. No user assets or the mainnet were affected.

Why it matters: The breach underscores the persistent risks in cross-chain bridges and the speed at which attackers can monetize exploits. While Cysic responded quickly, the majority of illicitly minted tokens were already moved off-platform. The incident also highlights the challenge of securing both on-chain and off-chain infrastructure, especially for newer projects in the zero-knowledge proof space.

Source: The Block