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Google acknowledges Chromecast’s ‘untrusted device’ error, says it is working on a fix | Technology News


In the last couple of days, several Chromecast users have complained they are getting an ‘untrusted device’ error. The issue seems to be affecting second-generation Chromecasts and music-streaming Chromecast Audio devices. As you can see in the screenshot below, users are getting an ‘untrusted device’ error with a text that says that the “device couldn’t be verified. This could be caused by outdated device firmware.”

In case you are wondering, this warning message seems to be appearing in apps like YouTube when users select the devices in question as Cast targets. Since the issue isn’t affecting those with Chromecast (3rd gen) and Chromecast Ultra, many thought Google might have bricked their older device or may be on the verge of announcing its end-of-life.

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Third generation Chromecast and Ultra users remain unaffected. (Image Source: matthijspc/Reddit)

Why is this happening?

According to a Reddit user who goes by the name tchebb, Google had issued an intermediate CA (Certificate Authority) that was valid for 10 years for the second-generation Chromecast devices. As it turns out, this certificate expired on March 9, and therefore, apps that relied on this are failing to validate the Chromecast as a genuine product.

Since then, Google has acknowledged the problem and said that they are currently working on a fix. In the meantime, the tech giant suggests that affected users refrain from factory resetting their device since it will no longer be able to connect to Wi-Fi. However, it is still unclear if and when Google plans to roll out the fix.

In case you have already factory reset your device, try setting up the Chromecast with your phone’s set to a date before March 9, 2025. This way, you will be able to go through the Chromecast setup process without encountering any authentication issues.

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