--- title: "Cysic suspends bridge after minted tokens moved to Ethereum" description: "The Block reports that an attacker minted 10 million CYS tokens and moved about $727,000 in proceeds to Ethereum through Mayan, deBridge and SWFT's Bridgers. Cysic suspended its bridge following the incident, according to the report. The report does not state who is responsible or whether the…" language: en canonical: "https://whycoinmoves.com/en/events/ethereum-cysic-suspends-bridge-after-attacker-b40db864cbf47a" published: 2026-10-20T09:11:04.000Z updated: 2026-10-20T12:38:59.000Z indexable: false --- # Cysic suspends bridge after minted tokens moved to Ethereum The Block reports that an attacker minted 10 million CYS tokens and moved about $727,000 in proceeds to Ethereum through Mayan, deBridge and SWFT's Bridgers. Cysic suspended its bridge following the incident, according to the report. The report does not state who is responsible or whether the… Attributed sources: [The Block]() ## Key facts The Block reports that an attacker minted 10 million CYS tokens and moved about $727,000 in proceeds to Ethereum through Mayan, deBridge and SWFT's Bridgers. Cysic suspended its bridge following the incident, according to the report. The report does not state who is responsible or whether the minted tokens were burned. Evidence strength: Single source, 1 publisher group(s) (The Block); this describes source coverage, not truth or causation. After site detection, observed returns were 5 minutes: -0.01% (difference from BTC +0.01 pp; 20/10/2026, 09:11 → 20/10/2026, 09:16, UTC; OKX · USDT); 1 hour: +0.40% (difference from BTC +0.16 pp; 20/10/2026, 09:11 → 20/10/2026, 10:13, UTC; OKX · USDT). Unlisted windows are unavailable. In the preceding 30 days, the 99th percentile of absolute hourly returns was 1.46% (OKX · USDT; cutoff 20/10/2026, 09:11, UTC). This hourly baseline is not directly comparable with a minute move. ## Returns after site detection | Window | Return | BTC | Difference from BTC | Actual sampled interval (UTC) | Source | | --- | --- | --- | --- | --- | --- | | 5 minutes | -0.01% | -0.02% | +0.01 pp | 20/10/2026, 09:11 → 20/10/2026, 09:16 | OKX · USDT | | 1 hour | +0.40% | +0.24% | +0.16 pp | 20/10/2026, 09:11 → 20/10/2026, 10:13 | OKX · USDT | | 24 hours | — | — | — | — | — | ## Historical hourly baseline | Metric | Value | | --- | --- | | Ready | true | | Coverage | 100.0% (720/720) | | Median absolute hourly return | 0.19% | | 99th percentile of absolute hourly returns | 1.46% | | BTC beta | 1.12 | | Source / cutoff (UTC) | OKX · USDT / 20/10/2026, 09:11 | ## Claims and open questions - An attacker minted 10 million CYS and bridged about $727,000 in proceeds to Ethereum via Mayan, deBridge and SWFT's Bridgers, per The Block. - Cysic suspended its bridge after the incident, according to The Block. - What Cysic's official statement says about the 10 million CYS mint and whether those tokens were burned or frozen is not established; an official notice from Cysic would confirm it. - Whether the bridge suspension was a contract-level pause or a front-end halt, and its scope, is unconfirmed; Cysic documentation or a contract announcement would clarify it. - Whether the roughly $727,000 in proceeds is a complete figure or an in-progress estimate is not verified; on-chain tracking or a Cysic post-mortem would confirm it. ## Source evidence - [Cysic suspends bridge after attacker mints tokens and moves $727,000 to Ethereum]() — The Block; published 18/10/2026, 16:07; received 20/10/2026, 09:11 (UTC). ## Recent ETH events and market reactions - [Ethereum postpones Glamsterdam upgrade on Hoodi testnet over contract risk]() — Published 23/10/2026, 04:59 (UTC) · Multiple publishers (2 publishers) · Project updates · 5m +0.18% / 1h +0.24% - [Ethereum developers postpone Glamsterdam upgrade on Hoodi testnet]() — Published 22/10/2026, 00:00 (UTC) · Official source (1 publisher) · General news · 5m -0.08% / 1h +0.06% - [Drift exploit-linked wallets move Ether into Tornado Cash]() — Published 20/10/2026, 12:38 (UTC) · Multiple publishers (2 publishers) · Security · 5m +0.01% / 1h -0.15% / 24h +2.97% - [Bitmine adds 12,535 ETH, reaching 6.04 million tokens in treasury]() — Published 19/10/2026, 15:13 (UTC) · Multiple publishers (2 publishers) · General news · 1h -0.30% - [JPMorgan deploys JPM Coin deposit token on Ethereum mainnet]() — Published 19/10/2026, 17:31 (UTC) · Multiple publishers (4 publishers) · General news · 5m -0.03% / 1h -0.39% - [Full coin archive]() ## Research for this archive - [Crypto hacks and price impact: Bybit and Cetus case studies]() - [Altcoin beta to Bitcoin: BTC, ETH, SOL and DOGE hourly returns]() - [Perpetual funding rates and annualized yield: a 2025 comparison]() - [Crypto listing and delisting effects: an OKX price study]() [Methods and limitations]() Publisher count is not independent evidence count. Price changes cannot verify news or prove causation.