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New X attack: accounts hacked via “fake calendar”
A new large-scale phishing campaign has been detected on social network X, targeting leaders of the crypto community. Unlike traditional fake login-page schemes, attackers are exploiting X’s own infrastructure, bypassing both passwords and two-factor authentication. 
Monero suffers 18-block reorg, wiping 36 minutes of transactions
Monero’s chain reorganized by 18 blocks, voiding roughly 36 minutes of activity and about 117 transactions. Community devs flagged a likely move to temporarily rolling DNS checkpoints as pools review practices after a hidden chain overtook the main network. 
Upbit launches 'Giwa' Ethereum layer-2 on testnet at UDC 2025
South Korea's largest crypto exchange Upbit unveiled Giwa, an Ethereum layer-2 network, during its annual developer conference UDC 2025 in Seoul on September 9. The event focused on blockchain development and Web3 infrastructure. The company launched Giwa's public testnet the same day. Wintermute pushes for clear crypto guidelines
Crypto market maker Wintermute has asked the U.S. Securities and Exchange Commission to confirm that "network tokens" like Bitcoin and Ethereum are not securities. The company also wants the SEC to explain how broker-dealers can trade, settle and custody tokenized securities. 
QNB to use JPMorgan’s blockchain for 24/7 dollar transfers
Qatar National Bank (QNB Group), one of the Middle East’s largest lenders, has connected to JPMorgan’s Kinexys Digital Payments – a distributed‑ledger network of deposit accounts that lets banks settle U.S. dollar payments around the clock in near real time. 
PayPal Ventures invests in Stable – PYUSD coming to Stablechain
PayPal Ventures has invested in the Layer 1 blockchain company Stable. The collaboration, announced on September 22, 2025, will integrate PayPal's stablecoin, PYUSD, into Stable's network, Stablechain. The stated purpose is to enable PYUSD for payments and other transactions directly on the network. 
Polygon experiences finalization outage due to node bug
On Sept. 10, the Polygon blockchain ran into transaction finalization issues due to a bug in the Bor and Erigon software clients used to run nodes. The incident affected certain RPC services and validator synchronization, but the network never stopped and continued producing blocks. 
