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CVE-2026-83215 – Unauthorized Data Access / RCE-Class Compromise – Oracle Siebel CRM Deployment 17.0

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Summary

CVE-2026-83215 is a vulnerability in the Server Infrastructure component of the Oracle Siebel CRM Deployment product. Oracle describes it as an easily exploitable flaw that allows an unauthenticated attacker with network access via HTTP to gain unauthorized access to critical data, with the potential for unauthorized modification. The issue carries a CVSS 3.1 base score of 8.2 (High) and was disclosed by Oracle on September 15, 2026.

Technical details

  • Root cause: A flaw in the Server Infrastructure component of Siebel CRM Deployment that improperly handles requests, exposing critical data to unauthorized access.
  • Trigger conditions: No authentication or user interaction is required; the attacker only needs network access to the vulnerable Siebel CRM HTTP interface.
  • Attack vector: Network (AV:N), exploitable over HTTP, with low attack complexity (AC:L) and no privileges required (PR:N).
  • Impact: High confidentiality impact (unauthorized access to critical data) and low integrity impact (limited unauthorized modification capability); Oracle rates availability impact as none.

Affected software

  • Oracle Siebel CRM Deployment, Server Infrastructure component, versions 17.0 through 26.7 (inclusive)

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Mitigation and recommended actions

  • Immediate: Apply the Oracle Critical Patch Update that addresses CVE-2026-83215, as published in Oracle’s September 2026 Security Alert advisory. Organizations running Siebel CRM Deployment 17.0 through 26.7 should update to the fixed version specified in the Oracle advisory.
  • If immediate patching is not possible: Restrict network access to Siebel CRM HTTP interfaces to trusted networks only, and monitor exposed Siebel endpoints for anomalous unauthenticated requests until the patch can be applied.

References

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