# GMO investigates suspected publication of customer data after cloud breach

_Published Tuesday, October 27, 2026 at 10:38 AM EDT · Security · Latest · Tier 2 — Notable_

![GMO investigates suspected publication of customer data after cloud breach — Primary](https://techcrunch.com/wp-content/uploads/2024/07/data-breach-overview-v2.jpg?resize=1200,675)

GMO Internet said October 27 that a suspected attacker had posted information appearing to relate to the company and its customers, TechCrunch reports. The company is checking whether the information is genuine following unauthorized access to its Onamae cloud desktop service for financial traders.

GMO has advised customers to reset passwords after reports of unauthorized operations on trading accounts. It says 27,000 servers may be affected. The service was shut down October 21; the newly reported publication adds a possible data exposure to the continuing investigation.

## Sources

- [TechCrunch](https://techcrunch.com/2026/10/27/japan-internet-giant-gmo-says-hackers-posted-stolen-customer-data/)

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Canonical: https://techandbusiness.org/newswire/ULXaCONem39THDZUFGBFsL
Published: 2026-10-27T14:38:38.606Z
Story chronology: 2026-10-27T13:32:57.000Z
Retrieved: 2026-10-27T16:39:58.176Z
Publisher: Tech & Business (techandbusiness.org)