Vulnerability details
CVE-2026-91663
Oracle Essbase
CVSS 3.1
9.9Critical
Official 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 T3, IIOP 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
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.9Critical | 3.1 | CVEProject cvelistV5 (CNA) (oracle) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Oracle Corporation | Oracle Essbase | 21.8.3.0.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://www.oracle.com/security-alerts/cpuoct2026.html vendor-advisory
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Details
- Published
- 2026-10-21
- Last updated
- 2026-10-23
- State
- Published
- Assigner (CNA)
- oracle
- Kolun priority
- 22 · Low
Exploit prediction (EPSS)
0.34%
Probability of exploitation in 30 days
27.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-284Improper Access Control