CVE-2026-71064

Modified Modified - Updated After Analysis

Portable Clusterware Remote Code Execution in Oracle Database

Publication date: 2026-08-18

Last updated on: 2026-08-22

Assigner: Oracle

Description

Vulnerability in the Portable Clusterware 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 unauthenticated attacker with access to the physical communication segment attached to the hardware where the Portable Clusterware executes to compromise Portable Clusterware. While the vulnerability is in Portable Clusterware, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Portable Clusterware. CVSS 3.1 Base Score 9.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-18

Last Modified

2026-08-22

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-71064

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Database Server's Portable Clusterware component affecting versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. An unauthenticated attacker with access to the physical network segment where the Clusterware runs can exploit it to take over the Clusterware. The attack has a high impact on confidentiality, integrity, and availability with a CVSS score of 9.6.

Detection Guidance

This vulnerability requires physical access to the network segment where Portable Clusterware operates, so standard network or system commands may not detect it. Focus on monitoring for unauthorized physical access or unusual activity in the clusterware environment.

Impact Analysis

If you use affected Oracle Database Server versions, an attacker could gain control of the Portable Clusterware, potentially leading to unauthorized access, data breaches, or system disruptions. The attack requires physical network access but can impact other products connected to the Clusterware.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate GDPR or HIPAA requirements for data protection and confidentiality. Organizations using affected Oracle versions should address this to maintain compliance.

Mitigation Strategies

Restrict physical access to the network segment where Portable Clusterware operates. Apply Oracle's security patches for affected versions immediately. Monitor for suspicious activity and ensure network segmentation is enforced.

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