CVE-2026-91644

CRITICAL

Summary

generated automatically from NVD data

CVE-2026-91644 affects the Security component of Oracle Essbase version 21.8.3.0.0. An unauthenticated attacker with network access over HTTP can easily exploit it, and because the scope changes, other products may also be significantly impacted. Successful exploitation can give access to all data Essbase can reach, plus unauthorized modification, insertion or deletion of some of that data. The CVSS 3.1 base score is 9.3 (CRITICAL).

NVD 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 HTTP to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Essbase accessible data as well as unauthorized update, insert or delete access to some of Oracle Essbase accessible data. CVSS 3.1 Base Score 9.3 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N).

EPSS · FIRST.org

0.22%probability of exploitation in the next 30 days

Higher than 11% of scored CVEs

EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-21, recomputed daily by FIRST.org.

In-depth analysis on cveo.tech

We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.