CVE-2026-83333: Oracle Corporation Oracle Database Server

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 Oracle Net to compromise Oracle Net Services. 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Affected products

• Oracle Corporation Oracle Database Server: from 23.4.0, up to and including 23.26.3

Published 2026-09-15. Last modified 2026-09-16.