How severe is CVE-2004-0387?

CVE-2004-0387 has a CVSS 2.0 base score of 5.1, rated medium severity.

Is CVE-2004-0387 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0387?

CVE-2004-0387 primarily affects Realnetworks Realone Player. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0387?

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

When was CVE-2004-0387 published?

CVE-2004-0387 was published on 2004-06-01 and last updated on 2026-06-16.

CVE-2004-0387

CVE-2004-0387 is a medium-severity vulnerability in Realnetworks Realone Player with a CVSS 2.0 base score of 5.1. 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 5.1)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Realnetworks Realone Player
Published: 2004-06-01
Last modified: 2026-06-16

Description

Stack-based buffer overflow in the RT3 plugin, as used in RealPlayer 8, RealOne Player, RealOne Player 10 beta, and RealOne Player Enterprise, allows remote attackers to execute arbitrary code via a malformed .R3T file.

Frequently asked questions

What is CVE-2004-0387?: Stack-based buffer overflow in the RT3 plugin, as used in RealPlayer 8, RealOne Player, RealOne Player 10 beta, and RealOne Player Enterprise, allows remote attackers to execute arbitrary code via a malformed .R3T file.
How severe is CVE-2004-0387?: CVE-2004-0387 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-2004-0387 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0387?: CVE-2004-0387 primarily affects Realnetworks Realone Player. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0387?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0387 published?: CVE-2004-0387 was published on 2004-06-01 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:realnetworks:realone_player:*:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realone_player:*:*:enterprise:*:*:*:*:*
cpe:2.3:a:realnetworks:realone_player:10_beta:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:realplayer:8.0:*:*:*:*:*:*:*

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