CVE-2026-91653
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
Vulnerability in Oracle Essbase (component: Essbase Web Platform) affecting version 21.8.3.0.0. A low privileged attacker with network access via HTTP can gain unauthorized access to critical data and update, insert or delete some Essbase data, with possible impact on additional products.
Risk Assessment
An attacker could access and modify critical data, potentially affecting related systems (scope change). The CVSS score of 8.5 reflects high confidentiality and integrity impact.
Recommendation
Update Oracle Essbase to the version containing Oracle's fix and restrict network access to the web interface.
Other vulnerabilities in Oracle Essbase
See all- CVE-2026-91665Critical
Vulnerability in Oracle Essbase (component: Security) affecting version 21.8.3.0.0. An easily exploitable vulnerability allows an unauthenticated attacker with network access via TCP to compromise Oracle Essbase. CVSS 3.1 Base Score 9.8.
- CVE-2026-91663Critical
Vulnerability in Oracle Essbase (component: Security) affecting version 21.8.3.0.0. An easily exploitable vulnerability allows a low-privileged attacker with network access via T3, IIOP to compromise Oracle Essbase, with potential impact on additional products (scope change). CVSS 3.1 Base Score 9.9.
- CVE-2026-91658Critical
Vulnerability in Oracle Essbase (component: Security) affecting version 21.8.3.0.0. An easily exploitable vulnerability allows a low-privileged attacker with network access via HTTP to compromise Oracle Essbase, with potential impact on additional products (scope change). CVSS 3.1 Base Score 9.9.
- CVE-2026-91656Critical
Vulnerability in Oracle Essbase (component: Federated Partitions) affecting version 21.8.3.0.0. An easily exploitable vulnerability allows a low-privileged attacker with network access via HTTP to gain unauthorized access to critical data, update, insert or delete it, and cause a partial denial of service, with potential impact on additional products (scope change). CVSS 3.1 Base Score 9.1.
- CVE-2026-91655Critical
Vulnerability in Oracle Essbase (Security component) affecting version 21.8.3.0.0. A low-privileged attacker with network access via HTTP can exploit it to gain unauthorized access to critical data, modify data, and cause partial denial of service. CVSS 9.1.
- CVE-2026-91644Critical
Vulnerability in Oracle Essbase (Security component) affecting version 21.8.3.0.0. An unauthenticated attacker with network access via HTTP can gain unauthorized access to critical data and modify data. CVSS 9.3.
- CVE-2026-91638Critical
Vulnerability in Oracle Essbase (Security component) affecting version 21.8.3.0.0. A low-privileged attacker with network access via HTTP can take over Oracle Essbase. CVSS 9.9.
- CVE-2026-91637Critical
Vulnerability in Oracle Essbase (Security component) affecting version 21.8.3.0.0. A low-privileged attacker with network access via HTTP can take over Oracle Essbase. CVSS 9.9.
- CVE-2026-70689Critical
Vulnerability in Oracle Essbase (component: Infrastructure) version 21.8.1.0.0. Easily exploitable by an unauthenticated attacker over HTTP, allowing takeover of the system. CVSS score 9.8.
- CVE-2026-91664High
A vulnerability in Oracle Essbase (Security component) affecting version 21.8.3.0.0. An easily exploitable flaw allows an unauthenticated attacker with network access via TCP to cause a hang or frequently repeatable crash (full DoS).
Original NVD description (English source)
Vulnerability in Oracle Essbase (component: Essbase Web Platform). 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 unauthorized access to critical data or complete access to all Oracle Essbase accessible data as well as unauthorized update, insert or delete access to some of Oracle Essbase accessible data. CVSS 3.1 Base Score 8.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS