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9.8
CVE-2026-91665: Oracle Essbase can be taken over remotely
CVE-2026-91665 · published 13 days ago
Summary
The 21.8.3.0.0 version of Oracle Essbase allows anyone on the network to access it without a password and gain full control. This could let an attacker read, change, or stop your data and services. Update to a patched version or restrict network access to trusted systems as soon as possible.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| oracle corporation | oracle essbase | 21.8.3.0.0 |
| oracle | essbase |
21.8.3.0.0 cpe:2.3:a:oracle:essbase:21.8.3.0.0:*:*:*:*:*:*:* |
Original advisory text
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 v...
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).
References
- https://www.oracle.com/security-alerts/cpuoct2026.html vendor-advisory
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically
- Gives an attacker full control
Type
CWE-287Improper Authentication
CWE-306Missing Authentication for Critical Function
Timeline
Published20 Oct 2026
Updated30 Oct 2026
First seen20 Oct 2026
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