CVE-2026-21999

MEDIUM EPSS 13.3%

Published Apr 21, 20262mo ago · Modified Jun 17, 20262w ago

5.3 CVSS 3.1

Medium

Published Apr 21, 2026 2mo ago

Last Modified Jun 17, 2026 2w ago

Description

Vulnerability in the XML Database component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise XML Database. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all XML Database accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).

CVSS Details

Base Score

5.3

Exploitability

1.6

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity None

Availability None

Threat Intelligence

EPSS Exploit Probability

13.3% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure

References 1

oracle.com https://www.oracle.com/security-alerts/cpuapr2026.html

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.