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CVE-2026-35278 – Unauthenticated Remote Code Execution – Oracle PeopleSoft Enterprise PeopleTools…

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Summary

CVE-2026-35278 is a critical, unauthenticated remote code execution vulnerability residing in the Performance Monitor component of Oracle PeopleSoft Enterprise PT PeopleTools, affecting versions 8.61 and 8.62. With a CVSS 3.1 base score of 9.8 (Critical), the flaw requires no authentication and no user interaction, enabling any network-accessible attacker to fully compromise the affected system over HTTP. Oracle addressed this vulnerability in its June 2026 Critical Security Patch Update (CSPU), released the same day as a separate out-of-band alert for CVE-2026-35273 — another critical flaw in the same product that has been actively exploited in the wild by the threat actor UNC6240 (ShinyHunters), breaching more than 100 organizations.

Technical details

  • Root cause: An easily exploitable flaw in the Performance Monitor component of PeopleSoft Enterprise PT PeopleTools allows unauthenticated remote attackers to compromise the system via HTTP. No CWE classification has been assigned at this time.
  • Trigger conditions: The vulnerability is reachable over the network without any prior authentication or user interaction, and requires only low attack complexity to exploit.
  • Attack vector: Network-accessible via HTTP; no credentials, special privileges, or local access are required.
  • Impact: Full compromise across confidentiality, integrity, and availability (C:H/I:H/A:H), consistent with complete system takeover.

Affected software

  • Oracle PeopleSoft Enterprise PT PeopleTools 8.61
  • Oracle PeopleSoft Enterprise PT PeopleTools 8.62

Severity

CVSS v3.1 Base Score: 9.8 (Critical)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply Oracle’s June 2026 Critical Security Patch Update (CSPU). Patch installation instructions are available through My Oracle Support document CPU167.
  • If immediate patching is not feasible, restrict network-level access to PeopleSoft infrastructure — including HTTP endpoints — from untrusted networks and internet-facing paths as an interim measure.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

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By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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