Swiss bank UBS has fallen victim to a cyberattack at a vendor that leaked the personal details of tens of thousands of employees.
The data was stolen from files held by supplier Chain IQ and posted on the darknet.
"A cyber-attack at an external supplier has led to information about UBS and several other companies being stolen," UBS says. "As soon as UBS became aware of the incident, it took swift and decisive action to avoid any impact on its operations."
The French-speaking Swiss newspaper Le Temps wrote that 130,000 pieces of data had been stolen from UBS. This would also include the direct telephone number of bank director Sergio Ermotti.
Another Swiss bank, Pictet, was also caught out by the attack, with the infiltrators stealing reams of invoice data from certain providers over recent years.
Both banks maintain that no client data had been stolen during the break-in.