CVE-2002-0509: Oracle ORACLE9I

Medium severity, CVSS 5.0. EPSS: 2.7% chance of exploitation in the next 30 days.

Transparent Network Substrate (TNS) Listener in Oracle 9i 9.0.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a single malformed TCP packet to port 1521.

Affected products

• Oracle ORACLE9I: version 9.0 only; version 9.0.1 only

Published 2002-08-12. Last modified 2026-06-16.