Dropbox said on Tuesday that around 5,000 accounts were compromised last month, with hackers viewing ​and downloading content stored on the cloud-storage ‌platform.

Here are a few details:

• Some Dropbox users received an email from the company on Monday notifying them that their accounts ​have been accessed without authorisation between August ​4 and August 21, Dropbox confirmed after Bloomberg News ⁠reported the hack earlier in the day.
• Hackers accessed ​files in fewer than a third of the compromised accounts, ​the company said.
• Shares of Dropbox fell around 2.4% in extended trading on Tuesday.
• Dropbox told Reuters that it identified unauthorised access ​affecting accounts linked to a Lenovo ID ​that did not have its two-factor authentication enabled, prompting the company ‌to terminate all sessions authenticated through a Lenovo ID.
• The company has removed any links between Lenovo IDs and Dropbox accounts and changed its systems so ​that users must ​enter their ⁠Dropbox password before accessing an account through Lenovo.
• Dropbox said it had reported ​the incident to data protection regulators.
• Lenovo identified ​a "legacy ⁠integration" between Lenovo ID and Dropbox that "could be used to improperly authenticate certain Dropbox accounts". The company ⁠said ​its own customers were not ​affected and that an investigation was ongoing.