VF Corporation, the parent company behind apparel and footwear brands like Vans, The North Face and Timberland, is warning of a cyberattack that could impact fulfillment of holiday orders. Personal information may also have been stolen.

The parent company of Vans, The North Face, Timberland, Eastpack, Kipling and Super, among others, first noticed “unauthorized events” in its IT systems on December 13. VF told Engadget. The hackers are said to have encrypted IT systems, but also stole company and personal data.

It is not clear exactly how much data is involved and what that data is. VF Company I do not want to detail Questions from TechCrunch Whether the hackers have demanded a ransom. It is also unknown if any customers were affected by the breach. It is not yet known who is behind the attack.

Although the brands’ physical stores remain open and orders can still be placed, VF Corp. It is facing necessary “operational disruptions”, making it difficult to fulfill orders just before Christmas. It is not known when the unrest will be resolved.

The data breach notification comes on the day new rules come into force when it comes to disclosing data breaches. The SEC now requires organizations to report cyber incidents, including data leaks, to the regulator within four business days.