CVE-2026-91633

Modified Modified - Updated After Analysis

Privilege Escalation in Oracle Essbase

Publication date: 2026-10-20

Last updated on: 2026-10-26

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 high privileged attacker with logon to the infrastructure where Oracle Essbase executes to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Essbase accessible data. CVSS 3.1 Base Score 6.0 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N).

CVSS Scores

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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-2026-91633

EUVD

EUVD-2026-106820

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	essbase	21.8.3.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Essbase version 21.8.3.0.0 within the Security component. It allows a highly privileged attacker with local access to compromise the system. The vulnerability has a CVSS base score of 6.0, indicating confidentiality impacts.

Detection Guidance

Detection of this vulnerability requires checking for Oracle Essbase version 21.8.3.0.0 and verifying if unauthorized access attempts or data access patterns are present. Review Oracle Essbase logs for suspicious activities and ensure the latest patches are applied.

Impact Analysis

An attacker could gain unauthorized access to critical data or full access to all data accessible by Oracle Essbase. This requires high privileges and local system access but could lead to significant data breaches.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR (data protection) and HIPAA (health data privacy) by exposing sensitive information. Compliance may be compromised if data is accessed without authorization.

Mitigation Strategies

Apply the latest security patches from Oracle for Essbase version 21.8.3.0.0. Restrict user privileges to the minimum required. Monitor network traffic for suspicious activity targeting Oracle Essbase components.

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