Google Works to Fix Outage Affecting Older Chromecast Devices

An expired security certificate has disrupted functionality for second-gen Chromecast and Chromecast Audio models, with a fix currently in development.

Second-generation Chromecast and Chromecast Audio devices stopped functioning due to an expired security certificate on March 9, 2025.
Affected users are encountering error messages such as 'Untrusted device' and are unable to cast content to their TVs or audio systems.
Google has confirmed the issue and is actively working on a fix, advising users not to perform a factory reset on their devices.
The problem stems from an expired intermediate certificate authority, which prevents the devices from authenticating with Google's backend systems.
While some users have attempted workarounds, Google assures that a solution will be rolled out to restore functionality soon.