CVE-2026-91663

Summary

Oracle Essbase contains a critical vulnerability in its Security component that allows low-privileged attackers with network access to fully compromise the system through T3 or IIOP protocols. This vulnerability affects version 21.8.3.0.0 and can lead to complete takeover of the affected database server.

Exploitability

The vulnerability is easily exploitable requiring only network access via T3 or IIOP protocols with low privilege credentials, making it highly attractive to attackers who can reach the system.

Blast radius

Successful exploitation could result in full compromise of Oracle Essbase and potentially impact additional Oracle products due to the scope change, leading to significant data breaches and service disruption.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to Oracle Essbase version 21.8.3.0.0 or later to remediate this vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.