Google has pushed an update to Chromecast bringing in some security enhancements. Here is the blogpost:
The Chromecast device has been updated to build 13300. This update will be rolled out over the next week, and you should receive the update automatically. The update is largely a maintenance release, and contains the following changes:
- Kernel update
- Security fixes
- Robustness improvements
- Security enhancements
Your Chromecast device will automatically download and install the update. Stay calm and keep casting!