Network Services Vulnerability in Oracle Database Server
CVE-2026-83350

7.5HIGH

Key Information:

Vendor

Oracle
Status
Oracle Database Server
Vendor
CVE Published:
15 September 2026

What is CVE-2026-83350?

A vulnerability exists in the Oracle Net Services component of Oracle Database Server that allows unauthenticated attackers to exploit it with network access. This flaw affects specific versions of the database, enabling potential attackers to disrupt service continuity by causing a hang or frequent crashes, ultimately leading to a complete Denial of Service (DoS). Organizations using the impacted Oracle Database versions should take immediate action to mitigate this risk as outlined in the Oracle security advisory.

Affected Version(s)

Oracle Database Server 21.3 <= 21.23

Oracle Database Server 23.4.0 <= 23.26.3

References

https://www.oracle.com/security-alerts/cspusep2026.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.