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).
Published: 2026-10-20
Score: 6 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Data confidentiality exposure
Action: Apply patch
AI Analysis

Impact

The flaw resides in the security component of Oracle Essbase version 21.8.3.0.0. It is identified as a CWE-284 weakness. An attacker who can gain local high‑privilege access to the host running Essbase can exploit the vulnerability to compromise the instance, subsequently obtaining unauthorized access to the data that the application can read. The impact is limited to confidentiality; no integrity or availability effects are documented. The CVSS vector indicates that the attack requires local access, a high privilege level, and no user interaction.

Affected Systems

Oracle Essbase version 21.8.3.0.0 produced by Oracle Corporation is affected. The advisory notes a scope change, meaning that exploitation may also influence other products or components that integrate with the Essbase server. No other versions or product variants are listed as affected.

Risk and Exploitability

The CVSS v3.1 base score of 6.0 classifies the issue as moderate severity. Exploitation requires local, high‑privileged access and does not involve any remote or user‑interaction pathways, making remote exploitation unlikely. The EPSS score of less than 1% indicates a very low probability of real‑world exploitation at this time, and the vulnerability is not currently listed in the CISA KEV catalog. Consequently, the greatest risk lies with internal attackers or compromised accounts that can obtain administrative privileges on the Essbase host. Regular monitoring for unusual administrative activity is recommended.

Generated by OpenCVE AI on October 27, 2026 at 11:54 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Oracle security patch for Essbase 21.8.3.0.0 as detailed in the Oracle CPU Oct 2026 advisory
  • If a patch is not immediately available, enforce strict least‑privilege policies on the hosts running Essbase and limit local logon rights to a minimal set of trusted administrators
  • Disable or remove unneeded services and network interfaces on Essbase servers to reduce the attack surface
  • Implement continuous monitoring of host and Essbase logs for anomalous activity that could indicate exploitation

Generated by OpenCVE AI on October 27, 2026 at 11:54 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 27 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title Local Privilege Escalation Enables Unauthorized Data Access in Oracle Essbase

Tue, 27 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
Title Local Privileged Attacker Can Compromise Oracle Essbase, Leading to Unauthorized Data Access
Weaknesses CWE-755

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Fri, 23 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
Title Local Privileged Attacker Can Compromise Oracle Essbase, Leading to Unauthorized Data Access
Weaknesses CWE-755

Fri, 23 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
Title High Privilege Local Exploit in Oracle Essbase Allowing Unauthorized Data Access
Weaknesses CWE-200
CWE-284

Fri, 23 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo

Wed, 21 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title High Privilege Local Exploit in Oracle Essbase Allowing Unauthorized Data Access
Weaknesses CWE-200
CWE-284

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
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).
First Time appeared Oracle
Oracle essbase
CPEs cpe:2.3:a:oracle:essbase:21.8.3.0.0:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle essbase
References
Metrics cvssV3_1

{'score': 6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-26T21:07:41.768Z

Reserved: 2026-09-14T22:10:16.649Z

Link: CVE-2026-91633

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2026-10-20T22:21:03.230

Modified: 2026-10-26T22:17:04.607

Link: CVE-2026-91633

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T12:00:08Z

Weaknesses