India, Dec. 17 -- A security researcher has demonstrated how a malicious ebook or audiobook file could compromise a Kindle device and expose Amazon account access. The attack, shown during a security conference in Europe and responsibly disclosed to Amazon in advance, highlights how everyday digital content can turn into a serious security threat.

A live security demonstration revealed how a single malicious book file could be used to compromise a Kindle device. The attack did not rely on fake emails, social engineering, or password theft. Instead, it began the same way many people read every day: by opening a book.

Once the file was processed by the Kindle, flaws in the device's software made it possible to access sensitive session dat...