CVE-2026-47040

CriticalCVSS 9.1

Published: 21/07/2026(UTC)Updated: 23/07/2026(UTC)Translated: 24/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.45%

37th percentile - higher than 37% of all known CVEs

Summary

Vulnerability in Oracle Net Services (part of Oracle Database Server) allows an unauthenticated attacker remote access to critical data and can cause a complete denial of service (DOS). CVSS score is 9.1.

Risk Assessment

An attacker can gain unauthorized access to all Oracle Net Services data and cause service hangs or frequent crashes.

Recommendation

Apply Oracle updates for versions 19.3-19.31, 21.3-21.22, and 23.4.0-23.26.2.

Original NVD description (English source)

Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 19.3-19.31, 21.3-21.22 and 23.4.0-23.26.2. 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 access to critical data or complete access to all Oracle Net Services accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).