A recently discovered vulnerability in popular Chinese-made ESP32 microcontrollers used by numerous crypto hardware wallets is raising alarm bells about the safety of Bitcoin transactions. Cybersecurity firm Crypto Deep Tech has reported a critical security flaw that could leave millions of dollars vulnerable to theft. The report reveals that attackers can exploit the chip’s built-in Bluetooth and Wi-Fi functionalities to inject malicious firmware updates, giving them access to private keys and the ability to execute unauthorized Bitcoin transactions without user notice. This vulnerability stems from a combination of factors, including weak random number generation and flawed validation checks, which enable attackers to compromise even seemingly secure systems.