# CVE-2002-0509

## Summary

- **CVE ID:** CVE-2002-0509
- **Severity:** UNKNOWN
- **CVSS Score:** 0.04
- **CWE:** N/A
- **Published:** Jun 11, 2002
- **Last Modified:** Mar 16, 2026

## Description

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

- n/a — n/a (n/a)

## References

- [CNA](http://www.securityfocus.com/bid/4391)
- [CNA](http://www.iss.net/security_center/static/8657.php)
- [CNA](http://online.securityfocus.com/archive/1/264697)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.01%
- **EPSS Percentile:** 76.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._