Vulnerability details
CVE-2026-91665
Oracle Essbase
CVSS 3.1
9.8Critical
Official 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
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (oracle) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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
- 25 · Low
Exploit prediction (EPSS)
0.47%
Probability of exploitation in 30 days
40.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-306Missing Authentication for Critical Function
- CWE-287Improper Authentication