---
id: CVE-2026-83347
title: Vulnerability in the Oracle Net Services component of Oracle Database Server
summary: >-
  Vulnerability in the Oracle Net Services component of Oracle Database Server. 
  Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable
  vulnerability allows unauthenticated attacker with network access via TCPS to
  comp…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
vendor: Oracle Corporation
product: Oracle Database Server
affected:
  - oracle_database_server >= 23.4.0 <= 23.26.3
published: '2026-09-15'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T17:17:03.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83347'
references:
  - url: 'https://www.oracle.com/security-alerts/cspusep2026.html'
    label: secalert_us@oracle.com
tags:
  - nvd
  - cve.org
epss: 0.00355
epssPercentile: 0.26428
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T16:13:32.770801Z'
ingestedAt: '2026-09-15T20:44:02.533Z'
---

## Overview

Vulnerability in the Oracle Net Services component of Oracle Database Server.  Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCPS to compromise Oracle Net Services.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 6.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.