CVE-2026-73964

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Oracle Database Server RDBMS Unauthorized Data Access

Publication date: 2026-10-20

Last updated on: 2026-10-27

Assigner: Oracle

Description

Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3-19.32 and 21.3-21.23. Easily exploitable vulnerability allows high privileged attacker having Query Optimizer privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in unauthorized read access to a subset of RDBMS accessible data. CVSS 3.1 Base Score 2.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-27

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-73964

EUVD

EUVD-2026-106279

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Oracle Database Server	19.3
Oracle Corporation	Oracle Database Server	21.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This is a vulnerability in the RDBMS component of Oracle Database Server affecting versions 19.3-19.32 and 21.3-21.23. It allows a high privileged attacker with Query Optimizer privilege to gain unauthorized read access to a subset of data via Oracle Net.

Detection Guidance

Detection requires monitoring for unauthorized access attempts to the RDBMS component. Check Oracle Database Server logs for unusual query optimizer privilege usage or network access via Oracle Net. Enable audit trails for high-privileged operations.

Impact Analysis

The impact is limited to unauthorized read access to a subset of data. The low CVSS score (2.7) indicates minimal risk as exploitation requires high privileges and network access.

Compliance Impact

This vulnerability allows unauthorized read access to a subset of RDBMS data, which could potentially expose sensitive personal or health information. This may impact compliance with GDPR or HIPAA if such data is involved, as unauthorized access violates confidentiality requirements.

Mitigation Strategies

Apply the latest Oracle Database Server patches for versions 19.3-19.32 and 21.3-21.23. Restrict Query Optimizer privilege access to only necessary users. Monitor network traffic for suspicious Oracle Net connections to the RDBMS.

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EPSS Chart

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