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5.6

Oracle Essbase may let remote attackers change or view data

CVE-2026-91646 · published 15 days ago
Summary

Version 21.8.3.0.0 of Oracle Essbase can be accessed over the network without any login, allowing an outsider to read, add, change or delete certain data and cause a partial slowdown of the service. This risk affects the security component of the product. Apply the latest vendor patch or upgrade to a newer version as soon as possible to close the gap.

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
VendorProductAffected 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. Difficult to exploit vulnerability allows unauthenticated attacker with network access...
Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle Essbase. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Essbase accessible data as well as unauthorized read access to a subset of Oracle Essbase accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Essbase. CVSS 3.1 Base Score 5.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L).
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.6 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-284Improper Access Control
Timeline
Published20 Oct 2026
Updated4 Nov 2026
First seen20 Oct 2026
Sources
CVE-2026-91646 · NVD
CVE-2026-91646 · MITRE
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