CVE-2026-83166 Overview
CVE-2026-83166 is an access control vulnerability in the Oracle Customer Interaction History product of Oracle E-Business Suite, specifically within the Outcome-Result component. The flaw affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access via HTTP can exploit this vulnerability to compromise confidentiality of data. The vulnerability carries a scope change, meaning successful exploitation can impact resources beyond the vulnerable component. Attackers can obtain unauthorized access to critical data or gain complete read access to all data accessible by Oracle Customer Interaction History. The weakness is categorized under [CWE-284: Improper Access Control].
Critical Impact
Authenticated attackers can obtain unauthorized read access to sensitive customer interaction data across Oracle E-Business Suite deployments, with scope change extending impact to additional integrated products.
Affected Products
- Oracle E-Business Suite - Customer Interaction History 12.2.3
- Oracle E-Business Suite - Customer Interaction History versions 12.2.4 through 12.2.14
- Oracle E-Business Suite - Customer Interaction History 12.2.15
Discovery Timeline
- 2026-09-15 - CVE-2026-83166 published to the National Vulnerability Database
- 2026-09-17 - Last updated in NVD database
Technical Details for CVE-2026-83166
Vulnerability Analysis
The vulnerability resides in the Outcome-Result component of Oracle Customer Interaction History, a module of Oracle E-Business Suite. The flaw enables an authenticated attacker with low privileges to bypass access control checks and reach data that should be restricted. Because the vulnerability introduces a scope change, exploitation can affect resources managed by other components integrated with Customer Interaction History. The confidentiality impact is high, while integrity and availability remain unaffected. This pattern is consistent with information disclosure through improperly enforced authorization boundaries.
Root Cause
The root cause is improper access control ([CWE-284]) within the Outcome-Result functionality. The component fails to enforce authorization checks that would restrict a low-privileged user from reading data outside their intended scope. Because Customer Interaction History aggregates interaction records tied to other Oracle E-Business Suite modules, the missing check exposes data belonging to adjacent products.
Attack Vector
Exploitation requires network access over HTTP and valid low-privileged credentials to the Oracle E-Business Suite instance. No user interaction is required. An attacker submits crafted HTTP requests to Outcome-Result endpoints to retrieve interaction records or referenced data. The scope change indicates that data outside the direct security context of Customer Interaction History becomes accessible through the same request path.
No verified public proof-of-concept code is available. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-provided technical details.
Detection Methods for CVE-2026-83166
Indicators of Compromise
- Unusual volumes of HTTP requests from low-privileged accounts targeting Oracle Customer Interaction History Outcome-Result endpoints.
- Application audit log entries showing read access to interaction records outside a user's assigned responsibility or organization.
- Session activity from service or integration accounts accessing Customer Interaction History data outside of scheduled batch windows.
Detection Strategies
- Enable and review Oracle E-Business Suite Sign-On Audit and page access tracking to identify unauthorized access to Customer Interaction History pages.
- Baseline normal query patterns for the Outcome-Result component and alert on deviations in request frequency or record counts returned.
- Correlate web tier access logs with application-layer authorization decisions to detect requests that bypass expected role restrictions.
Monitoring Recommendations
- Forward Oracle E-Business Suite application, database, and web tier logs to a centralized analytics platform for correlation and long-term retention.
- Monitor for privilege enumeration behavior, including sequential requests iterating through interaction identifiers.
- Alert on any low-privileged account performing bulk data retrieval from Customer Interaction History interfaces.
How to Mitigate CVE-2026-83166
Immediate Actions Required
- Apply the patches referenced in the Oracle Security Alert CSPUSEP2026 to all affected Oracle E-Business Suite 12.2.x deployments.
- Inventory all Oracle E-Business Suite environments running Customer Interaction History versions 12.2.3 through 12.2.15 and prioritize internet-exposed instances.
- Review and tighten role assignments for accounts with access to Customer Interaction History, removing unnecessary responsibilities.
Patch Information
Oracle addressed CVE-2026-83166 as part of the Security Alert CSPUSEP2026. Administrators should consult the advisory for the specific patch identifiers applicable to their Oracle E-Business Suite 12.2 patch level and apply them following Oracle's recommended maintenance procedures. See the Oracle Security Alert CSPUSEP2026 for full remediation guidance.
Workarounds
- Restrict network access to Oracle E-Business Suite HTTP endpoints using firewall rules, VPN gating, or reverse proxy allow-lists until patches are applied.
- Disable or restrict the Outcome-Result functionality for users who do not require it, using Oracle E-Business Suite function and menu security.
- Enforce multi-factor authentication for all Oracle E-Business Suite accounts to raise the cost of credential-based exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
