CVE-2026-83445: Oracle E-Business Suite Privilege Escalation

CVE-2026-83445 Overview

CVE-2026-83445 affects the Oracle Complex Maintenance, Repair and Overhaul (cMRO) product within Oracle E-Business Suite. The flaw resides in the Internal Operations component and impacts supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access over HTTPS can exploit the weakness without user interaction. Successful exploitation results in full takeover of the Oracle Complex Maintenance, Repair and Overhaul application. The issue is classified under CWE-269: Improper Privilege Management.

Critical Impact
Authenticated attackers can compromise confidentiality, integrity, and availability of the cMRO application, leading to complete application takeover.

Affected Products

Oracle E-Business Suite — Complex Maintenance, Repair and Overhaul 12.2.3
Oracle E-Business Suite — Complex Maintenance, Repair and Overhaul versions 12.2.4 through 12.2.14
Oracle E-Business Suite — Complex Maintenance, Repair and Overhaul 12.2.15

Discovery Timeline

2026-09-15 - CVE-2026-83445 published to NVD
2026-09-17 - Last updated in NVD database

Technical Details for CVE-2026-83445

Vulnerability Analysis

The vulnerability affects the Internal Operations component of Oracle Complex Maintenance, Repair and Overhaul, a module of Oracle E-Business Suite used to manage complex asset maintenance workflows. An attacker holding a low-privileged application account can send crafted HTTPS requests to the exposed cMRO endpoints and elevate their effective privileges within the application. The result is full takeover of the cMRO product context, including confidential maintenance records, work orders, and operational data.

Because cMRO runs within the broader E-Business Suite stack, application-level compromise can expose downstream business processes tied to inventory, procurement, and asset management data flowing through the same environment.

Root Cause

The weakness is categorized as Improper Privilege Management [CWE-269]. The affected component does not correctly enforce authorization boundaries between low-privileged and administrative operations. Requests that should be restricted to elevated roles are accepted from accounts holding only basic application privileges, allowing an attacker to perform actions outside their authorized role.

Attack Vector

Exploitation requires network access over HTTPS to the Oracle E-Business Suite interface hosting cMRO. The attacker must authenticate with a low-privileged account but does not need user interaction from a victim. Once authenticated, the attacker issues crafted requests to the Internal Operations component to trigger the privilege management flaw and gain control of the application. See the Oracle Security Alert CSPUSEP2026 for the vendor's technical description.

Detection Methods for CVE-2026-83445

Indicators of Compromise

Unexpected privilege changes or new administrative role assignments within cMRO audit tables.
HTTPS requests to Internal Operations endpoints originating from user accounts that historically only accessed self-service functions.
Anomalous work order, task, or asset modifications performed by non-administrative users.
Session activity from low-privileged accounts spanning administrative URLs within the E-Business Suite framework.

Detection Strategies

Review Oracle E-Business Suite FND_LOGINS and FND_UNSUCCESSFUL_LOGINS for suspicious authentication patterns preceding privileged actions.
Correlate application audit trails with web tier access logs to identify low-privileged sessions issuing administrative operations.
Baseline normal cMRO request patterns per role and alert on deviations targeting Internal Operations URLs.

Monitoring Recommendations

Enable and forward Oracle E-Business Suite audit logs and web tier access logs to a centralized SIEM for correlation.
Monitor for privilege escalation events, role grants, and configuration changes within cMRO in near real time.
Track outbound data volumes from cMRO application servers to identify potential exfiltration following compromise.

How to Mitigate CVE-2026-83445

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert CSPUSEP2026 to all affected E-Business Suite environments running versions 12.2.3 through 12.2.15.
Inventory all cMRO deployments and confirm patch status through Oracle's patch management tooling.
Rotate credentials for low-privileged accounts that access cMRO, especially shared or service accounts.
Restrict network reachability to the E-Business Suite web tier to trusted corporate networks and VPN ranges.

Patch Information

Oracle addressed CVE-2026-83445 in Security Alert CSPUSEP2026. Administrators should download and apply the patch bundle referenced in the Oracle Security Alert CSPUSEP2026 advisory. Oracle recommends applying security patches without delay because the vulnerability is easily exploitable by an authenticated attacker.

Workarounds

Limit access to the Internal Operations component to a minimal set of administrative users pending patch deployment.
Enforce network segmentation and web application firewall rules that restrict access to cMRO URLs.
Enable enhanced application auditing to detect exploitation attempts while patching is in progress.

bash

# Verify current Oracle E-Business Suite patch level
# Consult Oracle documentation for the correct procedure in your environment
sqlplus apps/<password> @$AD_TOP/sql/adpatchlist.sql