Additionally, the attackers potentially had access to bank sort codes and the last four digits of bank account numbers, as well.
"This incident was driven by criminals using email addresses and passwords acquired from an unknown source external to Vodafone," said Vodafone in a statement.
Everyone affected has been notified and have told to expect more phishing attempts.
The event marks the second time this week that a British telecom company has been hacked. TalkTalk recently saw information on 1.2 million customers stolen including over 20,000 bank account numbers.
Written by: Andre Yoskowitz @ 1 Nov 2015 14:45