How severe is CVE-2002-0509?

CVE-2002-0509 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2002-0509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-0509?

CVE-2002-0509 primarily affects Oracle Oracle9i. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-0509?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2002-0509 published?

CVE-2002-0509 was published on 2002-08-12 and last updated on 2026-06-16.

CVE-2002-0509

CVE-2002-0509 is a medium-severity vulnerability in Oracle Oracle9i with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Oracle Oracle9i
Published: 2002-08-12
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2002-0509?: 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.
How severe is CVE-2002-0509?: CVE-2002-0509 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2002-0509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0509?: CVE-2002-0509 primarily affects Oracle Oracle9i. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-0509 published?: CVE-2002-0509 was published on 2002-08-12 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:oracle:oracle9i:9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:oracle9i:9.0.1:*:*:*:*:*:*:*

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