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CriticalActively exploited vulnerabilityOct 28, 2026

Critical Flaws in Oracle PeopleSoft Actively Exploited by Attackers

Cybercriminals known as ShinyHunters have been actively exploiting a critical zero-day vulnerability in Oracle PeopleSoft since May. Security researchers revealed that the attack chains three separate flaws together to bypass internal controls and reach administrative interfaces. Oracle released an urgent patch in June, making immediate updates essential to prevent unauthorized access.

Actively exploited vulnerability security briefing

Who is affected

Organizations running unpatched installations of Oracle PeopleSoft are at risk.

How to mitigate it

  1. 1Apply the June Oracle security update addressing CVE-2026-35273 across all PeopleSoft instances immediately.
  2. 2Restrict access to internal management interfaces and isolate PeopleSoft servers from direct internet exposure.
  3. 3Inspect system and network logs dating back to May for signs of suspicious access or unusual server-side requests.

How Outsource IT solves this

Our managed threat protection delivers 24/7 monitoring and detection to spot unauthorized intrusions and contain active exploits targeting critical business software.

Managed Cybersecurity & Threat Protection

Tags

Oracle PeopleSoftZero-DayShinyHuntersPatch Management

Source advisory: the-hacker-news

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