Adobe Data Breach More Extensive Than Previously Disclosed

Adobe Systems said on Tuesday that the scope of a cyber-security breach disclosed nearly a month ago was far bigger than initially reported, with attackers obtaining data on more than 38 million customer accounts. The software maker also said that hackers had stolen part of the source code to Photoshop editing software that is widely used by professional photographers.

Adobe spokeswoman Heather Edell said that the company was not aware of any unauthorized activity on Adobe accounts as a result of the attack.

Yet Edell said she could not say whether stolen credit cards or passwords had been used to launch...