If you have been watching the news or reading the newspaper lately, you are probably already aware of the recent publicity about the vulnerability of the Wi-Fi Protected Access II (WPA2) protocol used to secure wireless networks using a Key Reinstallation Attack (KRACK). This is a vulnerability in the standard itself, not in specific products or client software. However, vendors have been, and are in the process of, releasing patches for their products to neutralise the flaw in the standard. Microsoft has already released a patch for Windows. Although a hacker would need to physically connect to your wifi signal to do anything with this vulnerability, we recommend that you check with the manufacturer of your router or wifi devices for new firmware.