CVE-2026-91665

Received Received - Intake

Oracle Essbase Remote Code Execution Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-22

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 TCP to compromise Oracle Essbase. Successful attacks of this vulnerability can result in takeover of Oracle Essbase. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-22

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91665

EUVD

EUVD-2026-106852

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	essbase	21.8.3.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

Executive Summary

This is a critical vulnerability in Oracle Essbase version 21.8.3.0.0. It allows an unauthenticated attacker with network access to remotely compromise the system via TCP. Successful exploitation could lead to full takeover of Oracle Essbase, impacting confidentiality, integrity, and availability.

Impact Analysis

An attacker could gain complete control over your Oracle Essbase system, potentially accessing, modifying, or deleting sensitive data. This could disrupt business operations and lead to data breaches or unauthorized system changes.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, and other regulations due to unauthorized data access or loss. Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Apply the latest security patches from Oracle for Essbase version 21.8.3.0.0. Restrict network access to Oracle Essbase via TCP ports. Monitor for unauthorized access attempts and disable the service if not in use.

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EPSS Chart

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