CVE-2026-83348
Received Received - Intake

RDBMS Component Takeover in Oracle Database Server

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Oracle

Description
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create DB Link privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-10-06
AI Q&A
2026-09-15
EPSS Evaluated
2026-10-05
NVD
CVE-2026-83348
EUVD
EUVD-2026-79701

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
oracle database_server From 19.3 (inc) to 19.32 (inc)
oracle database_server From 21.3 (inc) to 21.23 (inc)
oracle database_server From 23.4.0 (inc) to 23.26.3 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a vulnerability in the RDBMS component of Oracle Database Server affecting versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. It allows a low-privileged attacker with Create DB Link privilege to compromise the RDBMS via network access. Successful exploitation can lead to full takeover of the RDBMS.

Detection Guidance

This vulnerability requires detecting Oracle Database Server versions 19.3-19.32, 21.3-21.23, or 23.4.0-23.26.3. Check Oracle Database version using SQL query: SELECT * FROM v$version; or command: sqlplus / as sysdba --version. Ensure all affected versions are patched or updated.

Impact Analysis

An attacker could gain control of your Oracle Database Server, leading to unauthorized access, data theft, data manipulation, or service disruption. This could result in loss of confidentiality, integrity, and availability of your database and stored data.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Non-compliance may result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Apply the latest Oracle Critical Patch Update (CPU) for your Database Server version to address the RDBMS vulnerability. Ensure the Create DB Link privilege is restricted to only authorized users. Monitor network traffic for unusual database link creation activities.

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