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CVE-2026-62592 – Unauthenticated RCE/Full Compromise – Oracle Siebel CRM Integration (Open Integrati

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Summary

CVE-2026-62592 is a critical, unauthenticated remote takeover vulnerability in the Open Integration component of Oracle Siebel CRM’s Siebel CRM Integration product. The flaw is remotely exploitable over HTTP without any credentials or user interaction, and successful exploitation results in complete compromise of confidentiality, integrity, and availability of the affected system. Oracle rates this a Critical 9.8 CVSS issue and disclosed it in its August 2026 Critical Patch Update.

Technical details

  • Root cause: Oracle describes the flaw as an "easily exploitable" vulnerability in the Open Integration component of the Siebel CRM Integration product; no further technical root-cause detail (e.g., specific code path or injection type) has been published by Oracle or in the CVE record.
  • Trigger conditions: Reachable via network access to the affected Siebel CRM Integration HTTP interface; no authentication or user interaction is required to trigger it.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), delivered over HTTP.
  • Impact: Full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H) — Oracle states this "can result in takeover of Siebel CRM Integration."

Affected software

  • Oracle Siebel CRM — Siebel CRM Integration product, Open Integration component
  • Versions 25.12 through 26.6

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 the Oracle August 2026 Critical Patch Update fix for CVE-2026-62592 to all Siebel CRM Integration deployments running versions 25.12 through 26.6.
  • If patching cannot be applied immediately: Restrict network exposure of the Siebel CRM Integration Open Integration HTTP endpoints (e.g., via firewall rules, VPN, or access control lists) to trusted networks only until the patch is deployed, and monitor for anomalous unauthenticated requests to these interfaces.

References

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