Description
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Difficult to exploit vulnerability allows unauthenticated attacker 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 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published: 2026-09-15
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

A vulnerability in the RDBMS component of Oracle Database Server allows an unauthenticated attacker who can reach the database over Oracle Net to compromise the RDBMS. Successful exploitation can lead to a full takeover of the database, providing an attacker control that undermines confidentiality, integrity, and availability.

Affected Systems

The flaw affects Oracle Corporation's Oracle Database Server versions 23.4.0 through 23.26.3. Any deployment of these releases that exposes the Oracle Net service to the network is vulnerable, regardless of other security controls.

Risk and Exploitability

The CVSS 3.1 Base Score of 8.1 indicates high severity. The EPSS score of less than 1% suggests a low likelihood of widespread exploitation, and the vulnerability is not listed in CISA's KEV catalog. However, because the attack requires only network connectivity to Oracle Net and no other preconditions, the practical risk remains significant for exposed environments.

Generated by OpenCVE AI on September 20, 2026 at 07:13 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Oracle Database Server patch that fixes CVE-2026-83351 or upgrade to a version beyond 23.26.3.
  • Limit exposure of the Oracle Net service by allowing connections only from trusted networks or via VPN, and enforce IP-based filtering.
  • Enable database auditing and monitor logs for suspicious connections or authentication attempts.

Generated by OpenCVE AI on September 20, 2026 at 07:13 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Sun, 20 Sep 2026 07:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated Oracle Net Attack Enables Full Oracle Database Server Compromise

Fri, 18 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated Attacker Can Compromise Oracle Database via Oracle Net
Weaknesses CWE-287

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

Type Values Removed Values Added
Weaknesses CWE-269
Metrics ssvc

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

Thu, 17 Sep 2026 01:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Attacker Can Compromise Oracle Database via Oracle Net
Weaknesses CWE-287

Wed, 16 Sep 2026 13:15:00 +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 23.4.0-23.26.3. Difficult to exploit vulnerability allows unauthenticated attacker 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 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/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': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/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: 2026-09-17T13:00:25.395Z

Reserved: 2026-08-31T15:40:57.354Z

Link: CVE-2026-83351

cve-icon Vulnrichment

Updated: 2026-09-17T12:59:14.126Z

cve-icon NVD

Status : Deferred

Published: 2026-09-15T20:18:48.580

Modified: 2026-09-17T14:17:42.847

Link: CVE-2026-83351

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T07:15:16Z

Weaknesses
  • CWE-269

    Improper Privilege Management