High severity · published Sep 15, 2026
CVE-2026-83350
Vulnerability in the Oracle Net Services component of Oracle Database Server
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 21.3-21.23 and 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).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OD
Oracle Database Server · Oracle Corporation
21.3 through 21.23; 23.4.0 through 23.26.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-83350
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-83350
www.oracle.com
https://www.oracle.com/security-alerts/cspusep2026.html
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