Description
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).
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
Oracle Advisory
https://www.oracle.com/security-alerts/cpujul2026.html
Scores
CVSS v3
9.1
EPSS
0.0045
EPSS Percentile
37.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-306
Status
published
Products (3)
Oracle Corporation/Oracle Net Services
19.3 - 19.31
Oracle Corporation/Oracle Net Services
21.3 - 21.22
Oracle Corporation/Oracle Net Services
23.4.0 - 23.26.2
Published
Jul 21, 2026
Tracked Since
Jul 22, 2026