CVE-2026-91637

Analyzed Analyzed - Analysis Complete

Oracle Essbase Remote Code Execution Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-23

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 low privileged attacker with network access via HTTP 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 takeover of Oracle Essbase. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-20

Last Modified

2026-10-23

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91637

EUVD

EUVD-2026-106824

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 critical vulnerability in Oracle Essbase version 21.8.3.0.0 under the Security component. It allows a low-privileged attacker with network access via HTTP to compromise the system. Successful exploitation could lead to complete takeover of Oracle Essbase and potentially impact other connected products.

Detection Guidance

Detection requires checking for Oracle Essbase version 21.8.3.0.0 or affected configurations. Verify installed versions using Oracle's tools or package managers. Monitor network traffic for unusual HTTP requests targeting Essbase services. Check logs for unauthorized access attempts or privilege escalation patterns.

Impact Analysis

An attacker could gain full control over your Oracle Essbase system, leading to unauthorized access, data theft, modification or deletion of sensitive information, and disruption of services. The high CVSS score indicates severe potential impact on confidentiality, integrity, and availability.

Compliance Impact

This vulnerability could lead to unauthorized access or exposure of sensitive data, which may result in violations of GDPR, HIPAA, or other regulations. Organizations using Oracle Essbase may face compliance failures, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Apply the latest security patches from Oracle for Oracle Essbase version 21.8.3.0.0. Restrict network access to Oracle Essbase via HTTP to trusted sources only. Review and enforce strict access controls for low-privileged users.

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EPSS Chart

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