Quote:Dell confirmed in a press release published on November 28, 2018 that it detected and blocked unauthorized activity on its company network.

According to the press release, hackers were after Dell customer information. Access was limited to customer names, email addresses and hashed passwords, and did not include other data such as credit card information or addresses were not targeted according to Dell's investigation.

Dell's investigation of the incident "found no conclusive evidence" that any data was extracted; Dell admits that data could have been extracted despite that.

Quote:Though it is possible some of this information was removed from Dell’s network, our investigations found no conclusive evidence that any was extracted.

The company made the decision to reset Dell.com customer passwords as a countermeasure to protect customer accounts.

Quote:Additionally, Dell cybersecurity measures are in place to limit the impact of any potential exposure. These include the hashing of our customers’ passwords and a mandatory Dell.com password reset.

Full reading: https://www.ghacks.net/2018/11/29/dell-resets-customer-passwords-after-security-incident/