CVE-2026-71063

Unauthenticated Adjacent Access Allows Full Control of Oracle Portable Clusterware

Published Aug 18, 2026 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Oracle Corporation
Oracle Corporation oracle Database Server
Vendors & Products Oracle Corporation
Oracle Corporation oracle Database Server
Type Values Removed Values Added
Title Unauthenticated Adjacent Access Allows Full Control of Oracle Portable Clusterware
Type Values Removed Values Added
First Time appeared Oracle database Server
CPEs cpe:2.3:a:oracle:database_server:*:*:*:*:*:*:*:*
Vendors & Products Oracle database Server
Type Values Removed Values Added
Title Physical Access Exploitation of Oracle Portable Clusterware Enables Full Takeover
Type Values Removed Values Added
Title Physical Access Exploitation of Oracle Portable Clusterware Enables Full Takeover
Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
Title Unauthenticated Physical Access Allows Takeover of Oracle Database Portable Clusterware
Weaknesses CWE-269
CWE-285
Type Values Removed Values Added
Title Unauthenticated Physical Access Allows Takeover of Oracle Database Portable Clusterware
Weaknesses CWE-269
CWE-285
Type Values Removed Values Added
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).
First Time appeared Oracle
Oracle database - Portable Clusterware
CPEs cpe:2.3:a:oracle:database_-_portable_clusterware:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle database - Portable Clusterware
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
oracle
Published
Updated
Sep 17, 2026, 6:41 PM
Reserved
Aug 4, 2026, 10:06 PM
Status
Analyzed
Published
Aug 18, 2026, 9:18 PM
Modified
Oct 22, 2026, 5:09 PM