CVE-2023-21893: Oracle Database Server

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Vulnerability in the Oracle Data Provider for .NET component of Oracle Database Server. Supported versions that are affected are 19c and 21c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TCPS to compromise Oracle Data Provider for .NET. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Data Provider for .NET. Note: Applies also to Database client-only on Windows platform. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

Affected products

• Oracle Database Server: version 19c only; version 21c only

Published 2023-01-18. Last modified 2026-06-17.