Which products and versions are affected by CVE-2004-0389?

Affected: Helix Universal Server (Realnetworks) versions 9.0.1, 9.0.2. The full list is in the CVE brief.

Is CVE-2004-0389 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2004-0389 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2004-0389?

Public exploit code is available.

Is there a fix for CVE-2004-0389?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2004-0389 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2004-0389

HighPublic exploit

RealNetworks Helix Universal Server 9.0.1 and 9.0.2 allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference, as demonstrated using (1) GET_PARAMETER or (2) DESCRIBE requests.

Published Jun 1, 2004 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2004-0389 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Helix Universal Server (Realnetworks).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 55% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS (30-day exploit likelihood)

55%

Higher than 99.0% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2004-0389 brief as a PDF

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Description

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Helix Universal ServerRealnetworks	9.0.1, 9.0.2	n/a

Timeline

Publicly disclosed
Jun 1, 2004
Last updated
Apr 15, 2026

Weakness Type

CWE-476 NULL Pointer Dereference

References

advisory11395
advisoryhelix-get-dos(15880)
patch20040415 RealNetworks Helix Universal Server Denial of Service Vulnerability
exploitExploitDB-24010
exploit10157

FAQ

Common Questions.

RealNetworks Helix Universal Server 9.0.1 and 9.0.2 allows remote attackers to cause a denial of service (crash) via malformed requests that trigger a null dereference, as demonstrated using (1) GET_PARAMETER or (2) DESCRIBE requests.
Affected: Helix Universal Server (Realnetworks) versions 9.0.1, 9.0.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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