Google Rolls Out Fix for Chromecast Outage Tied to Expired Certificate

The widespread issue affecting second-generation Chromecast and Chromecast Audio devices is being addressed, but factory resets complicate recovery for some users.

Google has begun deploying a fix for second-generation Chromecast and Chromecast Audio devices that stopped working due to an expired authentication certificate authority.
The new firmware update transitions devices to a Google-owned certificate authority valid until 2045, preventing similar issues for the next 20 years.
Users are advised to keep their devices powered on and connected to Wi-Fi to receive the automatic update over the coming days.
Google has cautioned against performing factory resets, as this can exacerbate the issue and prevent devices from being re-setup without additional fixes.
Devices that were factory reset may require further updates or app-side changes, which Google is working to implement as quickly as possible.