Google Confirms Exploitation of Oracle PeopleSoft Zero-Day by ShinyHunters

Google has confirmed that a PeopleSoft vulnerability mitigated by Oracle this week has been exploited by ShinyHunters as a zero-day to steal data from organizations. Oracle has released an out-of-band advisory and security alert for CVE-2026-35273, a critical unauthenticated remote code execution vulnerability impacting PeopleSoft Enterprise PeopleTools versions 8.61 and 8.62, as well as PeopleSoft Enterprise Applications.  The software giant has released mitigations, but patches do not appear to be available. PeopleSoft is an ERP software suite used by many large organizations to manage a wide range of business functions, including HR, payroll, finance, supply chain, and campus operations.  While the solution is used across many industries, the ShinyHunters campaign exploiting CVE-2026-35273 appears to have focused on the education sector. The University of Nottingham in the UK is the first confirmed victim.  Mandiant and Google Threat Intelligence Group (GTIG) reported observing activity associated with the exploitation of the PeopleSoft zero-day between May 27 and June 9. The attacks have been attributed to ShinyHunters, which Google tracks as UNC6240. Google’s researchers notified more than 100 global organizations of potential exposure, the majority of which are based in the US, with 68% in the higher education sector.  The tech giant said some of the targets blocked the attack, but others had their systems compromised and data stolen. ShinyHunters claims to have targeted roughly 300 PeopleSoft instances belonging to 100 organizations. “The attacker staging environments hosted customized MeshCentral agents masquerading as legitimate cloud endpoints, which they used to run administrative command queries and deploy a custom lateral movement and defacement script, [victim_abbreviation]_fanout.sh,” Mandiant and GTIG explained. “This campaign directly correlates with subsequent data leaks of stolen organization data published on the ShinyHunters Data Leak Site (DLS) on June 9, 2026.” Google has shared remediation and hardening recommendations, as well as technical details on the attacks and indicators of compromise (IoCs). Oracle has not responded to SecurityWeek’s inquiry regarding exploitation.  TrendAI (Trend Micro’s enterprise business), whose researchers have been credited by Oracle for reporting CVE-2026-35273, told SecurityWeek that it’s currently seeing limited exploitation of the vulnerability, but its investigation is ongoing. Related: CISA Directs Federal Agencies to Prioritize Security Patches Based on Risk Related: Hackers Exploit Langflow Vulnerability for Remote Code Execution Related: ‘GreatXML’ Zero-Day Exploit Bypasses BitLocker WRITTEN BY Eduard Kovacs Eduard Kovacs (@EduardKovacs) is senior managing editor at SecurityWeek. He worked as a high school IT teacher before starting a career in journalism in 2011. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering. More from Eduard Kovacs University of Nottingham Confirms Breach After Hackers Leak Data Microsoft Patches Exploited Exchange Server Vulnerability Critical HVAC and UPS Vulnerabilities Could Let Hackers Disrupt Data Centers ServiceNow Patches Vulnerability Exploited Against Some Customers ICS Patch Tuesday: Vulnerabilities Fixed by Siemens, Schneider, Phoenix Contact Microsoft Patches 200 Vulnerabilities Adobe Patches 123 Vulnerabilities Anthropic Launches Claude Fable 5: Mythos-Class AI With Cybersecurity Guardrails  Latest News Oracle Addresses PeopleSoft Vulnerability Amid Reports of Zero-Day Attacks Alert Fatigue Is Becoming a Security Threat of Its Own CISA Directs Federal Agencies to Prioritize Security Patches Based on Risk OnyxC2 Stealer Offers Cybercriminals Enterprise-Grade Theft for $250 a Month Hackers Exploit Langflow Vulnerability for Remote Code Execution Siemens Says Desigo CC Files Flagged as Malware by Security Engines FBI Seizes 13 Websites That Officials Say Were Used by China to Target and Recruit US Workers Splunk, Palo Alto Networks Patch Severe Vulnerabilities Trending Webinar: How Modern Breaches Bypass MFA And Evade Detection June 17, 2026 Today’s attackers are no longer breaking in — they’re logging in. Join this live webinar as we break down the modern identity attack chain and examine how recent breaches exploited weaknesses in authentication, identity verification, and access management processes. Register Webinar: Modern Exposure Validation In The AI Era June 24, 2026 AI has accelerated both sides of the fight. Adversaries are weaponizing vulnerabilities faster, while defenders are racing to ship detections and configurations. Join this live webinar as we explore how to prove your controls actually hold against new threats, map your security maturity, and unite breach simulation with automated pentesting into a single, coordinated program. Register People on the Move Kasper Lindgaard has been appointed Vice President of Security Strategy at CoreView. Chaim Mazal has been named Chief Information Security Officer at GitLab. iCOUNTER has appointed Joel Molinoff as Chief Operating Officer (COO). More People On The Move Expert Insights After AI Reaches Production: 12 Ways Security Teams Can Take Control Security teams need more than visibility into AI applications, they need a repeatable framework for monitoring, investigating, and defending them in production. (Joshua Goldfarb) Everybody Is Vibe Coding But Nobody Told The Security Team AI-driven development is not something organizations can or should block. But it must be governed. (Danelle Au) The Zero-Knowledge Threat Actor And The End Of Responsible Disclosure AI can help attackers generate malware, create malicious payloads, bypass simple security checks, and convert vague malicious intent into functional code. (Etay Maor) Raising The Cybersecurity Stakes: Ante Up For The Agentic Era CISOs are now facing machine-speed attacks and asking, “How do I agent?” The industry must provide remediation at scale. (Nadir Izrael) Caught Off Guard: Securing AI After It Hits Production As enterprises rush AI projects into production, security teams are increasingly being forced into reactive mode. (Joshua Goldfarb) Flipboard Reddit Whatsapp Email