Oracle October 2026 CPU issues 1,295 patches, including CVSS 9.8 flaws
Six hundred ninety patches are remotely exploitable without authentication, spanning database, middleware, Java and applications.
72
CVE-2026-91665
Unauthenticated takeover of Oracle Essbase 21.8.3.0.0
- CVSS 3.1
- 9.8 critical
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
A missing or improper authentication flaw in the Security component of Oracle Essbase lets an unauthenticated attacker with network access over TCP compromise the server. Oracle rates it easily exploitable and says a successful attack can result in takeover of Essbase. The only supported version stated as affected is 21.8.3.0.0.
What to do: Apply Oracle’s security update that addresses CVE-2026-91665. No fixed version or workaround is stated for Essbase 21.8.3.0.0.
| Product | Affected |
|---|---|
| Oracle Essbase | 21.8.3.0.0 |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
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).
- Vendors
- oracle
- Products
- essbase
- Weakness
- CWE-287, CWE-306
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H