The organization disclosed the problem on Twitter just before 11:00 AM Pacific, but vowed that the attack would not interrupt festival programming. "Our artists' voices will be heard and the show will go on," said the festival.

The ticket purchasing system was partially restored approximately 45 minutes later; shortly after 12:00 PM Pacific, the festival clarified that the Salt Lake City Box Office is functional, but the Park City systems remain down.

The Sundance Film Festival has been subject to a cyberattack, causing network outages that shut down our box offices. Service at the Salt Lake City Main Box Office has since been restored, and our team is working hard to get our Park City system back up and running as soon as possible. No further information about the attack is available at this time. All screenings will still take place as planned.

As well as the attack on the SFF box office, Sundance also suffered a wide ranging internet failure Saturday. Up and down Main Street and in and out of screenings and panels, businesses and festival events were hobbled by a complete lack of internet access. Businesses are requiring all attendees and patrons presently to pay in cash only – which is not really happening, as almost all the ATMs are down too. No word yet from local officials or festival sources when they expect the word wide web to return to the indie film shindig.

It's not clear at this time if the outage is related to the cyberattack.