Amazon's Echo speakers featured a bug that meant the speaker continued to listen to its surroundings.
Security researchers found way to make the device continue listening long after it should have switched off. Amazon said this would not allow the recordings to be passed to hackers, but would have stayed with Amazon itself.
Amazon Echo speakers listen out for the word "Alexa", the name of its voice assistant, before completing a command, like "Alexa, read tell me today's news". Any interaction with Alexa is recorded to improve the service, but once the command is finished, Alexa stops recording.
But security researchers from Checkmarx developed an Alexa Skill that would keep Alexa listening long...