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Dropbox says about 5,000 accounts compromised in August hack

Hackers viewed and downloaded files in fewer than a third of the affected accounts, and Dropbox said it removed Lenovo ID links and tightened sign-in rules.

  • On Tuesday, Dropbox confirmed that around 5,000 accounts were compromised last month through a security flaw in its single sign-on integration with Lenovo IDs, with hackers viewing and downloading stored content.
  • An issue with Lenovo's email verification process allowed unauthorized parties to register Lenovo IDs using victims' email addresses, which Lenovo identified as a 'legacy integration' that 'could be used to improperly authenticate certain Dropbox accounts.'
  • Company spokesperson Tim Rathschmidt noted that compromised accounts lacked multi-factor authentication, and hackers accessed files in fewer than a third of the affected accounts.
  • Dropbox removed links between Lenovo IDs and accounts, expired all sessions previously 'authenticated' through the integration, and reported the incident to data protection regulators.
  • Shares of Dropbox fell around 2.4 per cent in extended trading on Tuesday, though Lenovo stated its own customers were not affected by the incident.
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Legacy Lenovo login opens 5,000 Dropbox accounts to attackers

Cloud storage biz severs old integration and urges victims to reset credentials

·London, United Kingdom
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Dropbox reported on Tuesday that approximately 5,000 accounts were compromised in August, with hackers viewing and downloading content stored on the cloud storage platform. Some Dropbox users received an email from the company on Monday (31) notifying them that their accounts had been accessed without authorization between August 4 and August 21, the company confirmed after Bloomberg News reported the intrusion earlier that day. Hackers accesse…

·Rio de Janeiro, Brazil
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9to5Mac broke the news in Cupertino, United States on Tuesday, September 1, 2026.
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