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 Execute on DBMS_REDEFINITION 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).
Published: 2026-09-15
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: RDBMS Takeover
Action: Immediate Patch
AI Analysis

Impact

A vulnerability in Oracle Database Server’s RDBMS component allows a low‑privileged attacker, possessing Execute on the DBMS_REDEFINITION object, to exploit Oracle Net from the network and compromise the database. The defect yields full control of the RDBMS, enabling confidentiality, integrity, and availability attacks. The CVSS 3.1 Base Score of 8.8 signifies high severity.

Affected Systems

The flaw affects Oracle Corporation’s Oracle Database Server. Supported, vulnerable releases include 19.3 through 19.32, 21.3 through 21.23, and 23.4.0 through 23.26.3.

Risk and Exploitability

The vulnerability’s CVSS score of 8.8 reflects a high‑impact scenario, while the EPSS score of less than 1 % suggests a low current exploitation probability. Because the flaw is not listed in the CISA KEV catalog, no public exploits are known as of the last update. Nevertheless, the attack vector—network access via Oracle Net— is reachable by anyone who can reach the database host, and a successful payload would give an attacker unrestricted control over the RDBMS instance.

Generated by OpenCVE AI on September 20, 2026 at 08:19 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor‑issued patch or upgrade to a non‑affected Oracle Database Server release.
  • Restrict Oracle Net traffic to legitimate hosts or segments using firewalls, VPNs, or ACLs.
  • Audit and limit the use of the DBMS_REDEFINITION execute privilege, applying least‑privilege principles and removing the privilege from low‑privileged accounts.

Generated by OpenCVE AI on September 20, 2026 at 08:19 UTC.

Tracking

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Advisories

No advisories yet.

History

Sun, 20 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Title Low-Privilege RDBMS Takeover via DBMS_REDEFINITION Execute

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Title Low‑Privilege Exploit via Oracle Net Allows RDBMS Takeover
Weaknesses CWE-284

Thu, 17 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 16 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Title Low‑Privilege Exploit via Oracle Net Allows RDBMS Takeover
Weaknesses CWE-269
CWE-284

Wed, 16 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
First Time appeared Oracle Corporation
Oracle Corporation oracle Database Server
Vendors & Products Oracle Corporation
Oracle Corporation oracle Database Server

Tue, 15 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
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 Execute on DBMS_REDEFINITION 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).
First Time appeared Oracle
Oracle database - Rdbms
CPEs cpe:2.3:a:oracle:database_-_rdbms:*:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle database - Rdbms
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Oracle Database - Rdbms
Oracle Corporation Oracle Database Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-09-17T13:10:39.003Z

Reserved: 2026-08-31T15:40:57.350Z

Link: CVE-2026-83271

cve-icon Vulnrichment

Updated: 2026-09-17T13:00:49.056Z

cve-icon NVD

Status : Deferred

Published: 2026-09-15T20:18:39.517

Modified: 2026-09-17T14:17:38.773

Link: CVE-2026-83271

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T08:30:16Z

Weaknesses
  • CWE-269

    Improper Privilege Management