An iSight spokeswoman didn't directly address why the information was withdrawn. "As this evolves, we are working on the best way to get the most important information out to people," she wrote via email on Sunday.
As many as six other U.S. companies are believed to be victims of point-of-sale related attacks, where malware intercepts unencrypted card details. So far, Target and high-end retailer Neiman Marcus have acknowledged the attacks.
Sign up for CIO Asia eNewsletters.