Core Insights - Ethereum Foundation awarded a $50,000 bug bounty to Trust Security for discovering a "high severity" attack vector in ERC-4337 (account abstraction) [1] - The identified issue could enable "review/harassment" attacks on account abstraction transactions, causing valid and correctly signed transactions to be maliciously rolled back and consume Gas [1] - Ethereum Foundation has completed a fix in the latest version and recommends related protocols to upgrade promptly [1]

Core Insights - Ledger, a cryptocurrency security company, is preparing for an initial public offering (IPO) in the U.S. with a potential valuation exceeding $4 billion [1] - The company is collaborating with investment banks Goldman Sachs, Jefferies, and Barclays to advance its listing plans, which could be completed as early as this year, although there are uncertainties involved [1] - Founded in 2014 and headquartered in France, Ledger specializes in hardware wallet devices and had an estimated valuation of approximately $1.5 billion in 2023 [1] - The CEO of Ledger indicated that the company is experiencing a record year, driven by an increase in demand for its products amid rising risks of hacking and fraud [1]

Core Insights - In December 2025, approximately 26 significant cryptocurrency security incidents occurred, resulting in total losses of around $76 million, a decrease of over 60% compared to losses of about $194 million in November [1] Summary by Category Security Incidents - The most notable incident involved address poisoning, leading to a loss of approximately $50 million from wallet 0xcB80...819 [1] - A private key leak resulted in the theft of about $27.3 million from multi-signature wallet 0xde5f...e965 [1] Loss Rankings - The top five incidents by individual loss in December were: 1. Multi-signature wallet 0xde5f...e965: $27.3 million 2. Babursol: $22 million 3. Trust Wallet: $8.5 million 4. Unleash Protocol: $3.9 million 5. Flow: $3.9 million [1]