Bitcoin mining operators woke up to an unauthorized switch of their machines to a different pool overnight. The attack reportedly began around 8 PM Central Time, with payouts pointed to a Bitcoin address controlled by the attackers.

About 64,000 machines and 13 EH/s of hashrate were redirected to the OCEAN mining pool, whose dashboard briefly approached 50 EH/s before falling back to about 40 EH/s.

CoreX Hosting raised the first alarm and later said the attack appeared to be over, with hijacked hashrate dropping to about 100 PH/s. The attackers mined no blocks, so they collected no block rewards, but affected miners lost the revenue they would have earned during the incident.

One affected operator blamed Luxor's Commander mining management software, and others reported similar unauthorized pool changes days earlier. Whether Commander was compromised, and the full scope of the damage, has not been independently confirmed.

South Korean exchange Coinone confirmed that an attacker broke into the server of MetaM, its outsourced customer support contractor, and viewed or leaked customer support records. The intrusion happened around 4 a.m. on November 12, and the contractor reported it to Coinone the same morning.

Exposed data may include names, phone numbers, resident registration numbers, bank account numbers, passwords, home addresses and wallet addresses shared during chat or phone support.

Coinone says member accounts, trading and wallet systems run separately from the MetaM server and shows no sign of a direct breach. Only users who contacted support are affected. The exchange moved support to email, blocked the attacking IPs and reported the incident to KISA, the Personal Information Protection Commission and the Financial Supervisory Service.

Users who shared passwords with support are urged to change them on Coinone and any service using the same password, and to ignore anyone posing as Coinone who asks for OTP codes, withdrawals or wallet address changes. Affected customers may seek statutory damages of up to 3 million won.

A wallet affiliated with the Ethereum Foundation has sold another 2,500 ETH through CoW Swap, receiving 4.597 million USDS in return. The proceeds were then moved to a multi-signature Safe wallet.

Over the past four days, the wallet has sold a total of 7,500 ETH for roughly $14.52 million in USDS.

The latest batch implies an average price of about $1,839 per ETH, below the roughly $1,936 average across the full four-day series. Sales from foundation-linked wallets are closely watched by the market as a signal of treasury management and potential sell pressure.

Unusual cross-chain transfers and sales of KAVA on BNB Smart Chain hit the Kava ecosystem on November 14, and the team traced the incident to Kava Lend, its lending and borrowing protocol. Kava said it was not the result of an infinite mint.

As a precaution, Kava paused its Axelar bridge, halting cross-chain asset withdrawals through the service. Upbit, Bithumb and Coinone suspended KAVA deposits and withdrawals, and Upbit also placed the token on its delisting watchlist.

KAVA fell from about $0.068 to $0.041 in 24 hours, a 41% drop.

Kava is a DeFi-focused Layer-1 built on the Cosmos SDK with an Ethereum co-chain. The team said it will publish a full incident report once the investigation is complete.

Two weeks into its recovery from the record $6.3B hack, Binance has widened its withdrawal restart well beyond the major chains, reopening withdrawals for 87 more networks this week.

The batch covers 87 networks, including HYPE, APT, NEAR, LTC, PLASMA, AVAX, ADA, TAO, ATOM, ICP, STARKNET, LINEA and MEGAETH.

The exchange aims to reopen withdrawals for all remaining networks and assets by the end of next week. Users may still see delays or longer processing times during the rollout, and should check each asset's withdrawal page or the network status page before sending funds.

Days after rebranding from the MegaETH Foundation, the organization behind the Ethereum L2 is restructuring around first-party products, co-founder Shuyao Kong confirmed on X.

The cuts mainly hit early chain development, wallet development and ecosystem support. The core founders and engineering team stay, and $30M from the existing treasury is set aside for new products, starting with a public AI inference marketplace planned for December 2026.

MegaETH TVL has fallen from a peak above $245M in May 2026 to roughly $12M.

The MEGA token listed on April 30, 2026. The pivot gives the network a product the team controls directly, but a smaller team and reduced ecosystem support may make it harder to attract outside builders.

The jurisdiction fight over event contracts has turned personal. Speaking at the Cantor Convergence conference, CFTC Chair Michael Selig called state suits against prediction market platforms "really egregious", saying states are bringing criminal charges to "lock up founders and CEOs" of companies offering lawful products under a federal regime.

The CFTC is fighting roughly a dozen states and cities over whether contracts on Kalshi, Polymarket and similar platforms are illegal gambling. On Thursday, the Justice Department and the CFTC sued Arkansas Attorney General Tim Griffin to block his action against Kalshi, while Louisiana filed a lawsuit targeting Kalshi, Polymarket, Robinhood and Coinbase.

Selig wants the dispute taken to the Supreme Court instead of being fought state by state, to settle the CFTC's claim of exclusive jurisdiction over prediction markets.

Until a ruling arrives, platforms and their executives remain exposed to parallel state enforcement, including criminal cases such as the Utah charges against Kalshi and its co-founders.

Japan's largest Bitcoin treasury company used its third-quarter results to reset expectations: the board lowered the full-year revenue target from ¥16 billion (about $100M) to ¥6.5 billion (about $41M), and operating profit guidance from ¥11.4 billion to ¥3 billion.

For January to September, Metaplanet booked a net loss of ¥27.2 billion (about $170M), against a ¥13.5 billion profit a year earlier. Revenue still rose 30.5% and operating profit 26.5%, but a ¥8 billion Bitcoin valuation loss and a ¥19.2 billion loss on Bitcoin sold in Q3 pushed the bottom line into the red.

The company sold 10,000 BTC in Q3, then bought back more, ending September with 44,000 BTC.

Metaplanet tied the cut to its mNAV staying below 1.0x, which blocked share issuance at the planned scale and slowed BTC buying. Proceeds from ¥52 billion in October convertible bonds will go to share buybacks first, while the company says its Bitcoin strategy is unchanged.

Ethena's consumer app, which already pays up to 6% APY on dollar balances and offers a Visa virtual card, now lets users send money to anyone by username instead of a wallet address.

Transfers between Ethena Pay users are free and instant, with no borders or limits. The app is live on iOS, and the card can be added to Apple Pay, with Google Pay listed as coming soon.

Ethena says its infrastructure has paid out $750M+ in rewards to holders and processed $30B+ in mints and redemptions with zero loss of user funds.

Username payments put the app closer to fintech peers like Revolut and Wise, which Ethena benchmarks its yield against. Balances still depend on Ethena's synthetic dollar model, so returns are variable rather than guaranteed.

The Tether-backed bitcoin treasury company disclosed its third-quarter results in an SEC filing, with net income of $1.087 billion coming almost entirely from $1.093 billion in fair-value gains on its bitcoin.

Twenty One Capital held 43,514 BTC as of Sept. 30, plus $102.8 million in cash. About 16,116 BTC collateralize $486.5 million in convertible notes.

Operations remain small: the quarter showed a $4.8 million operating loss, and the nine-month result is still a $186.5 million net loss after bitcoin's decline. CEO Rapha Zagury said the firm is evaluating bitcoin mining, lending, treasury and energy businesses, and would consider buybacks if shares trade below the value of its assets.

The company launched in April last year with backing from Tether, Bitfinex and SoftBank. Tether bought out SoftBank's stake in May, and XXI shares fell 19.5% over the past month versus a 16.1% drop in bitcoin.