CVE-2026-91647 Oracle Essbase - Remote Code Execution

Oracle Essbase 21.8.3.0.0 contains a security vulnerability allowing unauthenticated attackers with network access via TCP to compromise the system, potentially leading to full takeover, exploit requires network access with high complexity.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution, Information Disclosure, Data Tampering, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
20 October 2026
Updated
21 October 2026

Vendor fix

Update to the latest available version beyond 21.8.3.0.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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