Wu has learned that the Bitcoin wallet Electrum has officially released version 4.8.3, which fixes a critical security issue. All users are urged to upgrade immediately. The official statement indicates that detailed information about the vulnerability will be released later. Windows users are also advised that if Windows Defender displays a warning about ZXing.dll, this is a false alarm and can be ignored. [https://www.(wublock123.com)/news/electrum-4-8-3-security-fix-bitcoin-wallet-update-70650](https://www.wublock123.com)/news/electrum-4-8-3-security-fix-bitcoin-wallet-update-70650)