# Dropbox says Lenovo SSO issue enabled unauthorized account access

_Tuesday, September 1, 2026 at 8:54 AM EDT · Security · Latest · Tier 1 — Major_

![Dropbox says Lenovo SSO issue enabled unauthorized account access — Primary](https://9to5mac.com/wp-content/uploads/sites/6/2026/09/Dropbox-breach-seemingly-caused-by-egregious-authentication-failure.jpg?quality=82&strip=all&resize=1200,628)

Dropbox told affected users that unauthorized parties accessed their accounts between August 4 and August 21 after a problem involving Lenovo ID sign-in, according to an email published by 9to5Mac. Dropbox said its logs showed no evidence that files were viewed or downloaded. The company said it fixed the issue and expired sessions previously authenticated through a Lenovo ID. The report says the incident involved attackers registering Lenovo IDs with victims' email addresses.

## Sources

- [9to5Mac](https://9to5mac.com/2026/09/01/dropbox-login-breach-seemingly-caused-by-egregious-authentication-failure/)

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Canonical: https://techandbusiness.org/newswire/K4M7Eez5wu0I6imSY4iTLJ
Retrieved: 2026-09-01T16:46:23.718Z
Publisher: Tech & Business (techandbusiness.org)