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Security Breaches: Cloud Storage Providers
Brief
Tracking confirmed data breaches and security incidents involving major cloud storage providers. Focus on: incident date, scale (number of affected users), cause (CVE if known), the vendor's official response. Not needed: unverified forum rumors without confirmation from the vendor or a security researcher.
Description
Recent incidents point to a shift in the biggest cloud storage risks — away from sophisticated external attacks and toward insider access abuse and basic authentication gaps, with government-hosted infrastructure emerging as an increasingly attractive target.
Insider Threat Incident
A disgruntled employee at CloudSync, a business cloud storage provider, used legitimate access credentials to exfiltrate customer data before resigning. The breach went undetected for two months, during which sensitive business documents, contracts, and strategic plans belonging to thousands of client companies were accessed and reportedly offered for sale on dark web marketplaces.
Credential-Stuffing Campaign
A separate threat actor breached roughly 50 global companies by exploiting stolen credentials for cloud storage platforms that lacked multi-factor authentication. Major victims, including Iberia Airlines and Intecro Robotics, lost sensitive blueprints, medical records, and corporate secrets.
Government Infrastructure Breach
On March 24, 2026, the European Commission reported a cyberattack against the cloud infrastructure hosting its Europa web platform. Early findings indicated data was taken from affected websites, though the incident was contained quickly and internal systems were reportedly not impacted.
Broader Trend
Industry data shows significant cloud breaches rose 154% year-over-year, with roughly 80% of organizations reporting at least one cloud security incident in the past twelve months, and about 45% of all data breaches now occurring in cloud environments — commonly traced to misconfigured storage buckets or databases left accessible on the public internet.