Hackers could be spying on young children via insecure baby monitor cameras listed and recommended on Amazon, a consumer watchdog has claimed.
Security issues were found in cameras with thousands of positive reviews - and which were among Amazon’s Choice recommendations - that could allow hackers to ‘see through’ the devices.
Hackers could gain access to other devices on a home network, or watch children through baby monitors, the researchers found.
Flaws discovered included the sharing of unencrypted data including wi-fi passwords - which could allow hackers to gain access to other devices on a home wi-fi network - and weaknesses that could enable strangers to take remote control of a camera feed.
Which? claimed it also carried out further tests alongside a US-based security expert and uncovered an issue it suggests could affect more than 50,000 cameras in the UK and almost two million worldwide.
Adam French, consumer rights expert at Which?, said: "There appears to be little to no quality control with these sub-standard products, which risk people's security yet are being endorsed and sold on Amazon and finding their way into thousands of British homes.
"Amazon and other online marketplaces must take these cameras off sale and improve the way they scrutinise these products. They certainly should not be endorsing products that put people's privacy at risk.
"If they refuse to take more responsibility for protecting consumers against these security-risk products then the Government should look to make them more accountable."
The group's research named the Victure 1080p, Vstarcam C7837WIP, ieGeek 1080p, Elite Security, Accfly Camhi APP Outdoor Security Camera 1080P and Sricam 720p as those it tested and found issues with.
One device was found to come with a default username and "easily guessable default password", a practice condemned by government guidelines on internet-connected devices.
An Amazon spokesman said: "We require all products offered in our store to comply with applicable laws and regulations, and we proactively monitor multiple sources for safety notifications, including from regulatory agencies and direct contacts from brands, manufacturers, and sellers."