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Oracle Health legacy system breach affects nearly 20 million patients, filings show

Fox News reports that a cyberattack on legacy Cerner systems now run by Oracle Health compromised data of about 19.9 million people, according to Texas filings.

Updated Oct 18, 2026 · 18:16 UTC1 reports

The short version

  • Fox News reports that a cyberattack on legacy Cerner systems, now operated as Oracle Health, compromised data of about 19.9 million people.[Fox News]
  • Texas filings list 2,992,244 affected Texas residents, while Oregon, South Carolina and Washington report state-level figures that should not be added to the national total.[Fox News]
  • Investigators found evidence suggesting an attacker used stolen customer credentials to copy data from a legacy server not yet migrated to Oracle Cloud.[Fox News]
  • Key unknowns include how the credentials were stolen and whether server age contributed, and investigators have not established that server age caused the breach.[Fox News]

Key facts

  • About 19.9 million people's personal and medical information was compromised, according to Texas Attorney General filings.[Fox News]
  • The Texas Attorney General's October 2, 2026 filing lists 2,992,244 affected Texas residents.[Fox News]
  • Oregon reported 1,978,661 affected residents, South Carolina 283,903, and Washington 69,238, according to state notifications; these figures are portions of the overall incident.[Fox News]
  • Oracle became aware of the incident around February 20, 2025, according to its customer communications.[Fox News]
  • Oracle began notifying affected healthcare customers in March after discovering unauthorized access involving older Cerner systems.[Fox News]
  • Investigators found evidence suggesting an attacker used stolen customer credentials to access a legacy server sometime after January 22, 2025, then copied information to a remote server that had not yet been migrated to Oracle Cloud.[Fox News]
  • According to earlier BleepingComputer reporting, an individual using the name 'Andrew' allegedly contacted affected hospitals, demanded cryptocurrency payments, and threatened to leak or sell stolen patient information.[Fox News]
  • The breach involved older Cerner systems that Oracle acquired in June 2022 for approximately $28.3 billion and that now operate as Oracle Health.[Fox News]

What remains uncertain

  • The precise way the attacker obtained the stolen credentials remains unclear, and investigators have not publicly established that the server's age caused the breach.[Fox News]
  • At the time of reporting, researchers had not established a connection between the attacker and a known ransomware or extortion group, and the extortion allegations rest on earlier BleepingComputer reporting.[Fox News]

Sources

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.