Coinbase, Binance, and ZenGo have fixed critical vulnerabilities in widely used cryptographic protocols that could have allowed attackers to steal private keys from users' wallets. The vulnerabilities, called BitForge, were identified by the Fireblocks Cryptography Research Team and could have affected millions of users. The vulnerabilities downgraded the protection offered by the multi-party computation (MPC) system to that of a conventional single key system. Wallet providers that utilize the GG-18, GG-20, and Lindell17 protocols were impacted, and Fireblocks recommends that users check with their providers or consult their BitForge Status Tracker to see if their wallet may be affected.