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Oracle PeopleSoft RCE Flaw Used as Zero

Securityaffairs.Co •Pierluigi Paganini • June 12, 2026

ShinyHunters exploited a critical Oracle PeopleSoft zero-day to breach over 100 organizations, mostly universities, before a patch was available. Mandiant and Google’s Threat Intelligence Group published an analysis of an active ShinyHunters campaign on June 11, one day after Oracle finally issued an advisory for the vulnerability being exploited. The gap matters: the activity ran […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

ShinyHunters Exploits Oracle PeopleSoft Zero-Day Vulnerability A critical zero-day vulnerability (CVE-2026-35273) in Oracle PeopleSoft has been exploited by the ShinyHunters group, leading to breaches of over 100 organizations, primarily in the education sector. The vulnerability allows unauthenticated remote code execution, enabling attackers to compromise systems without prior authentication. The exploitation occurred between May 27 and June 9, 2026, before Oracle's advisory was published on June 10, 2026. Mandiant confirmed that approximately 500,000 student records from the University of Nottingham were among the stolen data. Attackers utilized a 'gadget chain' of vulnerabilities to facilitate the breaches, and the stolen data has been published on the ShinyHunters Data Leak Site. Oracle has issued an urgent advisory recommending immediate patching and mitigation measures, but as of now, no official patch is available. Organizations are advised to restrict internet-facing access to vulnerable systems. 65 sources 77

Extracted Entities

Oracle PeopleSoft RCE Flaw Used as Zero

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Extracted Entities

APT Groups (1)

Attack Types (1)

Campaigns (1)

MITRE ATT&CK (1)

Platforms (1)