Originally, it was reported that it was code for older Enterprise products, not the versions used for consumers. In addition, it was claimed that it was a third party and not Symantec's network that was breached.
Since then, it was discovered that Symantec's network was compromised. Following that discovery, it was learned that the secret source code for pcAnywhere, a widely used brand of remote control software was also leaked.
Finally, today, Symantec tells customers to disable pcAnywhere.