On a recent Thursday afternoon, a Consumer Reports journalist received an email containing a grainy image of herself waving at a doorbell camera she’d set up at her back door.

If the message came from a complete stranger, it would have been alarming. Instead, it was sent by Steve Blair, a CR privacy and security test engineer who had hacked into the doorbell from 2,923 miles away.

Blair had pulled similar images from connected doorbells at other CR employees’ homes and from a device in our Yonkers, N.Y., testing lab. While we expected him to gain access to these devices, it was still a bit shocking to see photos of the journalist’s deck and backyard. After all, video doorbells are supposed to help you keep an eye on strangers at the door, not let other people watch you.

Blair was able to capture those images because he and fellow test engineer David Della Rocca had found serious security flaws in this doorbell, along with others sold under different brands but apparently made by the same manufacturer. The doorbells also lack a visible ID issued by the Federal Communications Commission (FCC) that’s required by the agency’s regulations, making them illegal to distribute in the U.S.

Thousands of these video doorbells are sold each month on Amazon and other online marketplaces, including Walmart, Sears, and the globally popular marketplaces Shein and Temu. Experts say they’re just a drop in the flood of cheap, insecure electronics from Chinese manufacturers being sold in the U.S.

Previously, regulators have asserted that thousands of unsafe products, including potentially dangerous children’s sleepwear, carbon monoxide detectors and dietary supplements, have been widely available on Amazon.

“Big e-commerce platforms like Amazon need to take more responsibility for the harms generated by the products they sell,” said Justin Brookman, director of technology policy for CR. “There is more they could be doing to vet sellers and respond to complaints. Instead, it seems like they’re coasting on their reputation and saddling unknowing consumers with broken products.”