Adobe Systems has confirmed that its source codes and data have been hacked, including the credit card details of up to 3 million customers.
"Very recently, Adobe's security team discovered sophisticated attacks on our network, involving illegal access of customer information as well as source code for numerous Adobe products," Adobe chief security officer Brad Arkin said.
"Our investigation currently indicates that the attackers accessed Adobe customer IDs and encrypted passwords on our systems.
"We deeply regret that this incident occurred.
"We're working diligently internally, as well as with external partners and law enforcement, to address the incident."
Mr Arkin said he understood that credit and debit card numbers remain encrypted. The company is in the process of alerting its users.