Cl0p Ransomware Exploits Oracle E-Business Suite Zero-Day Vulnerability
Cl0p ransomware operators exploited a previously unknown zero-day vulnerability in Oracle E-Business Suite (EBS), enabling unauthorized access to the networks of major organizations, including Cox Enterprises. The attackers leveraged this flaw between August 9-14, 2025, to steal sensitive data before Oracle released a patch on October 5. Cox Enterprises detected the breach in late September and subsequently notified affected individuals after confirming that personal data had been exposed. The Cl0p group later published the stolen information on their dark web extortion portal, listing Cox among 29 new victims.
This campaign is part of a broader wave of attacks by Cl0p, which has a history of targeting widely used enterprise platforms through zero-day vulnerabilities. Other high-profile victims in this Oracle EBS campaign include Michelin, Canon, Mazda, Estée Lauder, Broadcom, and even Oracle itself. The group’s tactics mirror previous operations against MOVEit Transfer, GoAnywhere MFT, and Cleo file transfer tools, involving data theft followed by public leaks and extortion attempts. The scale and rapid escalation of the Oracle EBS campaign highlight the ongoing threat posed by Cl0p’s exploitation of critical enterprise software vulnerabilities.
Timeline
Nov 25, 2025
Dartmouth College confirms breach and begins response
Dartmouth College confirmed it had been compromised in the Cl0p Oracle EBS campaign and said at least 1,494 Maine residents were affected. The college secured systems, notified law enforcement, applied available Oracle patches, and offered credit monitoring.
Nov 22, 2025
Cox Enterprises discloses breach and notifies affected individuals
Cox Enterprises publicly disclosed the Oracle E-Business Suite data breach, saying 9,479 individuals were affected. The company began offering free identity theft protection and credit monitoring to impacted people.
Nov 22, 2025
Cl0p publishes stolen Cox Enterprises data
Cl0p posted Cox Enterprises' stolen data on its leak site, publicly claiming responsibility for the breach. On the same day, the group also listed 29 new victims from multiple sectors.
Oct 5, 2025
Oracle releases patch for CVE-2025-61882
Oracle issued a patch for the Oracle E-Business Suite zero-day vulnerability CVE-2025-61882, which Cl0p had been exploiting in the wild. The fix came after the August attack window described by affected organizations.
Sep 30, 2025
Cox Enterprises detects the breach
Cox Enterprises did not discover the Oracle E-Business Suite intrusion until late September 2025, weeks after the initial exploitation window. This marked the company's internal detection of the data breach.
Aug 9, 2025
Cox Enterprises breached via Oracle EBS zero-day
Between August 9 and August 14, attackers exploited CVE-2025-61882 to breach Cox Enterprises and steal data. The incident was later attributed to the Cl0p ransomware group as part of the same Oracle EBS campaign.
Aug 9, 2025
Dartmouth College breached via Oracle EBS zero-day
Between August 9 and August 12, Dartmouth College was compromised in the Cl0p campaign through the Oracle E-Business Suite zero-day. Sensitive data was stolen, including names, Social Security numbers, and financial account information.
Aug 9, 2025
Cl0p exploits Oracle EBS zero-day against multiple organizations
A broader campaign began in which the Cl0p ransomware group exploited Oracle E-Business Suite zero-day vulnerability CVE-2025-61882 to steal data from organizations across sectors. Reported victims later included Cox Enterprises, Dartmouth College, GlobalLogic, Allianz UK, Logitech, The Washington Post, Envoy Air, and Harvard University.
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Cl0p Ransomware Group Exploits Oracle E-Business Suite Zero-Day for Data Theft and Extortion
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