CVE-2026-91617
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Unauthorized Data Access in Oracle Middleware Common Libraries

Publication date: 2026-10-20

Last updated on: 2026-10-26

Assigner: Oracle

Description
Vulnerability in the Oracle Middleware Common Libraries and Tools product of Oracle Fusion Middleware (component: Remote Diagnostic Agent). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Middleware Common Libraries and Tools executes to compromise Oracle Middleware Common Libraries and Tools. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Middleware Common Libraries and Tools accessible data. CVSS 3.1 Base Score 5.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-26
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91617
EUVD
EUVD-2026-106809

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

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Executive Summary

This is a vulnerability in Oracle Middleware Common Libraries and Tools, specifically in the Remote Diagnostic Agent component. It affects versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. The issue allows a low-privileged attacker with local access to compromise the system, potentially leading to unauthorized access to critical data.

Detection Guidance

This CVE affects Oracle Middleware Common Libraries and Tools, specifically the Remote Diagnostic Agent component. Detection requires checking installed versions of Oracle Middleware Common Libraries and Tools against affected versions (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0). Review system logs for unauthorized access attempts or suspicious activity related to the Remote Diagnostic Agent.

Impact Analysis

If exploited, this vulnerability could allow an attacker to access sensitive data stored or processed by Oracle Middleware Common Libraries and Tools. Since the attacker needs local access, the risk is higher in environments where unauthorized physical or remote logins are possible.

Compliance Impact

This vulnerability allows unauthorized access to critical data or complete access to all accessible data in Oracle Middleware Common Libraries and Tools. Such unauthorized access could lead to violations of data protection regulations like GDPR or HIPAA, which require strict controls over data confidentiality and integrity.

Mitigation Strategies

Apply the latest Oracle Critical Patch Update (CPU) for the affected versions of Oracle Middleware Common Libraries and Tools. Ensure the Remote Diagnostic Agent component is updated to a patched version. Restrict logon privileges to the infrastructure where this component executes to limit unauthorized access.

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