The security research group Checkmarx has claimed to have identified a vulnerability that could have allowed hackers to bypass Android permission restrictions to remotely open and control device cameras without their owners' knowledge. This issue, which apparently affected Google and Samsung apps, has reportedly been addressed in recent software updates.
https://www.notebookcheck.net/The-cameras-on-hundreds-of-millions-of-Android-phones-could-have-been-hijacked.443273.0.html