CVE-2026-91634

Modified Modified - Updated After Analysis

Oracle Essbase Unauthorized Data Read Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-27

Assigner: Oracle

Description

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle Essbase. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Essbase accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-27

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91634

EUVD

EUVD-2026-106821

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	essbase	21.8.3.0.0

Helpful Resources

Exploitability

CWE

KEV

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

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Essbase version 21.8.3.0.0 affecting the Security component. It allows unauthenticated attackers with network access via T3 or IIOP protocols to read a subset of accessible data without needing credentials.

Impact Analysis

An attacker could exploit this to gain unauthorized read access to sensitive data stored in Oracle Essbase, potentially exposing confidential information such as business or user data.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating compliance requirements for data protection such as GDPR or HIPAA, which mandate strict controls over data confidentiality and access.

Mitigation Strategies

Apply the latest Oracle Essbase security patches immediately. Restrict network access to Oracle Essbase ports (T3, IIOP) using firewalls. Disable unnecessary services and monitor for unauthorized access attempts.

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