The personal mobile phone numbers of the British Prime Minister and 25 of her Cabinet Ministers are being sold on the internet, The Mail revealed.
They can be accessed on a shady US website charging just £6.49 for access to the information.
Phone numbers and other personal data for Liz Truss, Chancellor Kwasi Kwarteng, Defence Secretary Ben Wallace, Foreign Secretary James Cleverly and Home Secretary Suella Braverman are among those listed on the site. Labour leader Sir Keir Starmer's phone number is also on there.
On the eve of the Conservative Party conference, Ministers were assessing the threat with national security advisers, after the MoS alerted them to the breach, which also included email addresses and passwords.
The Cabinet Office said it was investigating and that some of the information was old. But the MoS confirmed that the data haul contained 26 current phone numbers for the Cabinet, including Ms Truss's
A former British intelligence officer last night called the breach 'truly shocking' and warned that private information could be targeted using software that plants a virus on the phone via a text message.
Subscribers to the US website, which this newspaper is declining to name, can simply search for any information by typing in someone's name.
The website takes just seconds to trawl through data stolen in cyber attacks going back more than a decade. The site claims to have more than 14 billion files of 'compromised assets' on its searchable database.
