CVE-2004-0389: Realnetworks Helix Universal Server

High severity, CVSS 7.5. EPSS: 54.9% chance of exploitation in the next 30 days.

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 products

• Realnetworks Helix Universal Server: version 9.0.1 only; version 9.0.2 only

Published 2004-06-01. Last modified 2026-06-16.